56K* Commands Technical Reference
Typing Commands Basic Data Commands Extended Data Commands S-Registers Fax Commands Screen messages Front Panel Lights Serial Interface

TECHNICAL REFERENCE

Typing Commands
Type commands in either upper or lower case, not a combination. Use the Backspace key to delete errors. (You cannot delete the original AT command since it is stored in the modem buffer.) If a command has numeric options and you do not include a number, zero is assumed. For example, if you type ATB, the command ATB0 is assumed. Every command except A/, +++, and A> must begin with the AT prefix and be entered by pressing ENTER. The maximum command length is 58 characters. The modem does not count the AT prefix, carriage returns, or spaces.
All defaults are based on the &F1Hardware Flow Control template loaded in NVRAM when the modem is shipped. Defaults are listed in italics.
Note: Defaults are marked with an asterisk (*).

Basic Commands

<control key>S Stop or restart help screens. <control key>C or <control key>K Stop help screens. $ A A/ Any key AT Bn * Use in conjunction with D, S, or & commands (or just AT) to display a basic command list; online help. Manual Answer: goes off hook in answer mode. Pressing any key aborts the operations. Re-executes the last issued command. Used mainly to redial. Does not require the AT prefix or a Carriage Return. Aborts off-hook dial/answer operation and hangs up. Required command prefix, except with A/, +++, and A>. Use alone to test for OK result code. U.S./ITU-T answer sequence B0 ITU-T answer sequence B1 U.S. answer tone
Dials the specified phone number, includes the following: 0-9 Numeric digits #, * Extended touch-tone pad tones L Dials the last dialed number P Pulse (rotary) dial R Originates call using answer (reverse) frequencies Sn Dials the phone number string stored in NVRAM at position n (n = 03); phone numbers are stored with the &Zn=s command T Tone dial , (Comma) Pause, See S8 definition; which it is linked to ; (Semicolon) Return to Command mode after dialling / Delays for 125 ms. before proceeding with dial string W Wait for second dial tone (X2 or X4); linked to S6 register @ Dials, waits for quiet answer, and continues (X3 or higher) $ Displays a list of Dial commands Sets local echo E0 Echo OFF E1 Modem displays keyboard commands

Fn * Hn

Sets online local echo of transmitted data ON/OFF F0 Local echo ON, modem sends a copy of data it sends to the remote system to your screen F1 Local echo OFF, receiving system may send a remote echo of data it receives Controls ON/OFF hook H0 Hangs up (goes on hook) H1 Goes off hook Displays the following information I0 Four-digit product code I1 Results of ROM checksum I2 Results of RAM checksum I3 Product type I4 Current modem settings I5 Nonvolatile memory (NVRAM) settings I6 Link diagnostics I7 Product configuration I9 Plug and Play information I11 Extended link diagnostics

* Mn *

Controls speaker volume (internals only) L0 Lowest volume L1 Low volume L2 Medium volume L3 High volume Operates speaker M0 Speaker always OFF M1 Speaker ON until CONNECT M2 Speaker always ON M3 Speaker ON after dial, until CONNECT Returns online O0 Returns online O1 Returns online and retrains Displays/suppresses result codes Q0 Displays result codes Q1 Quiet mode; no result codes Q2 Displays result codes only in Originate mode
Sr.b=n Sets bit.b of register r to n (0/OFF or 1/ON) Sr=n Sr? S$ Vn * Xn Sets register r to n. Displays contents of S-Register r Displays a list of the S-Registers Displays verbal/numeric result codes V0 Numeric codes V1 Verbal codes Sets result code displayed, default is X4 Result Codes 0/OK 1/CONNECT 2/RING 3/NO CARRIER 4/ERROR 5/CONNECT 1200 6/NO DIAL TONE 7/BUSY 8/NO ANSWER* 9/Reserved X0 Xn Setting X1 X2 X3 X4

*Requires @ in dial string; replaces NO CARRIER
Xn (Continued) Result Codes (Continued) 10/CONNECT 2400 11/RINGING 13/CONNECT 9600 18/CONNECT 4800 20/CONNECT 7200 21/CONNECT 12000 25/CONNECT 14400 43/CONNECT 16800 85/CONNECT 19200 91/CONNECT 21600 99/CONNECT 24000 103/CONNECT 26400 107/CONNECT 28800 151/CONNECT 31200 155/CONNECT 33600 256/CONNECT 28000 260/CONNECT 29333 264/CONNECT 30666 268/CONNECT 32000 180/CONNECT 33333 272/CONNECT X0
Xn Setting X1 X2 X3 X4
Xn (Continued) Result Codes (Continued) 276/CONNECT 36000 184/CONNECT 37333 280/CONNECT 38666 284/CONNECT 40000 188/CONNECT 41333 192/CONNECT 42666 196/CONNECT 44000 200/CONNECT 45333 204/CONNECT 46666 208/CONNECT 48000 212/CONNECT 49333 216/CONNECT 50666 220/CONNECT 52000 224/CONNECT 53333 228/CONNECT 54666 232/CONNECT 56000 236/CONNECT 57333 Adaptive Dialling Wait for 2nd Dial Tone (W) Wait for Answer (@) Fast Dial X0
Xn Setting X1 X2 X3 X4 9
Selects power-on/reset default configuration Y0 Use profile 0 setting in NVRAM Y1 Use profile 1 setting in NVRAM Y2 Use factory configuration 0 (&F0) Y3 Use factory configuration 1 (&F1) Y4 Use factory configuration 2 (&F2) Resets modem Z0 Resets modem to NVRAM profile selected by Y command or dip 7 Z1 Resets modem to NVRAM profile 0 Z2 Resets modem to NVRAM profile 1 Z3 Resets modem to factory default profile 0 (&F0) Z4 Resets modem to factory default profile 1 (&F1) Z5 Resets modem to factory default profile 2 (&F2)

Extended Data Commands

&$ &An Displays a list of ampersand (&) commands Enables/disables additional result code subsets (see Xn) &A0 ARQ result codes disabled &A1 ARQ result codes enabled &A2 Modulation indicator added &A3 Protocol indicators addedLAPM/MNP/NONE (error control) and V42bis/MNP5 (data compression)
&Bn * &Cn * &Dn
Manages modems serial port rate &B0 Variable, follows connection rate &B1 Fixed serial port rate &B2 Fixed in ARQ mode, variable in non-ARQ mode Controls Carrier Detect (CD) signal. &C0 CD override &C1 Normal CD operations Controls Data Terminal Ready (DTR) operations &D0 DTR override &D1 DTR toggle causes online Command mode &D2 Normal DTR operations &D3 Resets on receipt of DTR Loads a read-only (non-programmable) factory configuration &F0 Generic template, no flow control &F1 Hardware flow control template &F2 Software flow control template

* &Fn

&Hn *
Sets Transmit Data (TD) flow control (see also &Rn) &H0 Flow control disabled &H1 Hardware flow control, Clear to Send (CTS) &H2 Software flow control, XON/XOFF &H3 Hardware and software flow control Sets Receive Data (RD) software flow control (see also &Rn) &I0 Software flow control disabled &I1 XON/XOFF signals to your modem and remote system &I2 XON/XOFF signals to your modem only Enables/disables data compression &K0 Data compression disabled &K1 Auto enable/disable &K2 Data compression enabled &K3 MNP5 compression disabled Sets Error Control (ARQ) for connections at 1200 bps and higher &M0 Normal mode, error control disabled &M1 Reserved &M2 Reserved &M3 Reserved &M4 Normal/ARQ &M5 ARQ mode

&In

&Kn *

&Mn

&Nn
Sets connect speed, if connection cannot be made at this speed, the modem will hang up. When used in conjunction with &Un and &Un is greater than 0, &Nn sets the ceiling connect speed. &Un sets the floor connect speed. (See also the table in the &Un section.) &N0 Connection speed is determined by the remote modem &Nbps &Nbps &Nbps &Nbps &Nbps &Nbps &N7 12,000 bps &N8 14,400 bps &N9 16,800 bps &N10 19,200 bps &N11 21,600 bps &N12 24,000 bps &N13 26,400 bps &N14 28,800 bps &N15 31,200 bps &N16 33,600 bps Sets Receive Data (RD) hardware flow control, Request to Send (RTS) (see also &Hn) &R0 Reserved &R1 Modem ignores RTS 13

&Rn

* &Sn * &Tn

&R2

Received Data to computer only on RTS
Controls Data Set Ready (DSR) operations &S0 DSR override; always ON &S1 Modem controls DSR Begins test modes. &T0 Ends testing &T1 Analogue Loopback &T2 Reserved &T3 Local Digital Loopback &T4 Enables Remote Digital Loopback &T5 Prohibits Remote Digital Loopback &T6 Initiates Remote Digital Loopback &T7 Remote Digital with self-test and error detector &T8 Analogue Loopback with self-test and error detector

&Un &U0 &U1 &U2 &U3 &U4 &U5 &U6 &U7 &U8 &U9 &U10 &U11 &U12 &U13 &U14 &U15 &U16 No restrictions on the minimum speed for the connection 300 bps 1200 bps 2400 bps 4800 bps 7200 bps 9600 bps 12,000 bps 14,400 bps 16,800 bps 19,200 bps 21,600 bps 24,000 bps 26,400 bps 28,800 bps 31,200 bps 33,600 bps

&Wn

Writes current configuration to NVRAM templates &W0 Modifies the NVRAM 0 template (Y0) &W1 Modifies the NVRAM 1 template (Y1) Sets break handling &Y0 Destructive, but doesnt send break &Y1 Destructive, expedited &Y2 Nondestructive, expedited &Y3 Nondestructive, unexpedited Writes phone number string s to NVRAM at position n (n = 03) Writes last executed dial string to NVRAM at position n (n = 03) Displays the phone number stored at position n (n = 03) Displays the last executed dial string Escapes to online-command mode

&Yn *

&Zn=s &Zn=L &Zn? &ZL? +++

S-Registers

To change a setting, use the ATSr=n command, where r is the register and n is a decimal value from (unless otherwise indicated).

Register Default

S0 S1 S2 S3 S4 S5 S6 S60

Function

Sets the number of rings on which to answer in Auto Answer mode. When set to 0, Auto Answer is disabled. Counts and stores the number of rings from an incoming call. (S0 must be greater than 0.) Stores the ASCII decimal code for the escape code character. Default character is +. A value of disables the escape code. Stores the ASCII code for the Carriage Return character. Valid range is 0 127. Stores the ASCII decimal code for the Line Feed character. Valid range is 0 127. Stores the ASCII decimal code for the Backspace character. A value of 128255 disables the Backspace keys delete function. Sets the number of seconds the modem waits before dialling. If Xn is set to X2 or X4, this is the time-out length if there isn't a dial tone. Sets the number of seconds the modem waits for a carrier.

S8 S9 S6 14

Sets the duration, in seconds, for the pause (,) option in the Dial command. Sets the required duration, in tenths of a second, of the remote modems carrier signal before recognition by the 3Com U.S. Robotics modem. Sets the duration, in tenths of a second, that the modem waits to hang up after loss of carrier. This guard time allows the modem to distinguish between a line disturbance from a true disconnect (hang up) by the remote modem. Note: If you set S10 = 255, the modem will not hang up when carrier is lost. Dropping DTR hangs up the modem.

S11 S12 S13

Sets the duration and spacing, in milliseconds, for tone dialling. Sets the duration, in fiftieths of a second, of the guard time for the escape code sequence (+++). Bit-mapped register. Select the bit(s) you want on and set S13 to the total of the values in the Value column. For example, ATS13 = 17 enables bit 0 (value is 1) and bit 4 (value is 16). Bit 4 Value 16 Result Reset when DTR drops. Reset non-MNP transmit buffer from 1.5K to 128 bytes.* Set backspace key to delete. On DTR signal, auto dial the number stored in NVRAM at position 0. At power on/reset, auto dial the number stored in NVRAM at position 0.

S13 (Continued)

Bit 7 Value 128 Result Reserved Disable quick retrains. Disconnect on escape code.
* The 1.5K-byte non-ARQ buffer allows data transfer with Xmodem- and Ymodem-type file transfer protocols without using flow control. The 128-byte option lets remote users with slower modems keep data youre sending from scrolling off their screens. When remote users send your computer an XOFF (Ctrl-S) and you stop transmitting, the data in transit from your modems buffer does not exceed the size of their screen. This is also very helpful in situations when a remote modem/printer application is losing characters. S14 S0 Reserved Bit-mapped register setup. To set the register, see instructions for S13. Bit 4 Value 16 Result Disable ARQ/MNP for V.22. Disable ARQ/MNP for V.22bis. Disable ARQ/MNP V.32/V.32bis/V.32terbo. Disable MNP handshake. Disable MNP level 4. 19

S15 (Continued)

Bit Value Result Disable MNP level 3. MNP incompatibility. Disable V.42 operation. To disable V.42 detect phase, select the total of the values for bits 3 and 7 (in other words S15 = 136 [the sum of values 8 and 128])

S16 S17 S18

Reserved Reserved Test timer for &T loopback testing. Sets the time in seconds of testing before the modem automatically times out and terminates the test. When set to 0, the timer is disabled. Valid range is 1-255. Sets the duration, in minutes, for the inactivity timer. The timer activates when there is no data activity on the phone line; at time-out the modem hangs up. S19 = 0 disables the timer. Reserved Sets the length, in 10-millisecond units, of breaks sent from the modem to the computer; applies to MNP or V.42 mode only.

S19 S20 S21

S22 S23 S24 S20
Stores the ASCII decimal code for the XON character. Stores the ASCII decimal code for the XOFF character. Reserved Sets the duration, in hundredths of a second, that DTR must be dropped so that the modem doesnt interpret a random glitch as a DTR loss. (Most users will want to use the default; this register is useful for setting compatibility with older systems running under older operating software.) Reserved Bit-mapped register setup. To set the register, see instructions for S13. Bit 6 Value 64 Result Enables ITU-T V.21 modulation at 300 bps for U.K. calls Enables unencoded (non-trellis coded) modulation in V.32 mode. Disables V.32 modulation. Disables 2100 Hz answer tone to allow two V.42 modems to connect faster. Enables V.23 fallback mode. Disables V.32bis mode. Disable V.42 selective reject.

S26 S27

S27 (Continued)
Bit 7 Value 128 Result Software compatibility mode. This setting disables the codes and displays the 9600 code instead. The actual rate of the call can be viewed on the ATI6 screen. Used for unusual software incompatibilities. Some software may not accept 7200, 12,000, and 14,400 bps or greater result codes.
Eliminates the V.32 answer tones for a faster connection. Default item, all times are in tenths of seconds. Disables all connections except V.32 at 9600 bps. Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer. Reserved Reserved

S29 S30 S31

Bit-mapped register setup. To set the register, see the instructions for S13. Bit Value Result V.8 Call Indicate enabled. Enables V.8 mode. Reserved. Disable V.34 modulation. Disable V.34+ modulation. Disable x2 modulation. Disable V.90 modulation. Reserved.
Bit-mapped register setup. To set the register, see the instructions for S13. Bit Value Result Disable 2400 symbol rate. Disable 2743 symbol rate. Disable 2800 symbol rate. Disable 3000 symbol rate. Disable 3200 symbol rate. Disable 3429 symbol rate. Reserved Disable shaping.
Bit-mapped register setup. To set registers, see instructions for S13. Bit Value Result Disable 8S-2D trellis encoding. Disable 16S-4D trellis encoding. Disable 32S-2D trellis encoding. Disable 64S-4D trellis encoding. Disable non-linear coding. Disable TX level deviation. Disable Pre-emphasis. Disable Pre-coding. Reserved

S35-S37 S38 0

Sets an optional delay, in seconds, before a forced hang-up and clearing of the Transmit buffer when DTR drops during an ARQ call. This allows time for a remote modem to acknowledge receipt of all transmitted data before it is disconnected. The modem immediately hangs up when DTR drops. This option only applies to connections terminated by dropping DTR. If the modem receives the ATH command, it ignores S38 and immediately hangs up. Reserved

S39-S40 S41 S0 0

Reserved Reserved

Fax Commands

+FCLASS=n Sets the mode of operation FCLASS=0 Data mode FCLASS=1 Group 3 Facsimile Service Class 1 mode FCLASS=2.0 Group 3 Facsimile Service Class 2.0 mode Displays the current FCLASS mode (see mode descriptions above) Displays the FCLASS mode options (see mode descriptions above) Stops the fax transmission. Then the modem waits for a specified time before OK appears on screen. The pause is set in 10 millisecond intervals. n is the number of 10 millisecond intervals that pass before OK appears. (n=0-255) Makes the modem wait for a specified length of silence before sending OK to the screen. The pause is set in10 millisecond intervals. n is the number of 10 millisecond intervals that pass before OK appears.(n=0-255) Note: This command terminates with OK when either the specified amount of silence is detected or when the user anything (which is ignored). Transmits data using the modulation specified by n.(n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the Screen Messages table at the end of this section for an explanation of messages that appear in response to this command.

FCLASS? +FCLASS=? +FTS=n

+FRS=n

+FTM=n

+FRM=n
Receives data using the modulation specified by n. (n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the Screen Messages table at the end of this section for an explanation of messages that appear in response to this command. Transmits data framed in the HDLC protocol using the modulation specified by n. (n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the Screen Messages table at the end of this section for an explanation of messages that appear in response to this command. Receives data framed in the HDLC protocol using the modulation specified by n. (n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the Screen Messages table at the end of this section for an explanation of messages that appear in response to this command.

+FTH=n

+FRH=n

Screen Messages

Displayed Displayed as a number in words OK CONNECT RING NO CARRIER ERROR NO DIAL TONE BUSY CONNECT/ FAX Description The previous command has been processed successfully. The modem has just connected to another modem. Reports the receipt of a network altering ring. No carrier is being received from the modem. The previous command line has not been recognized or was completed abnormally. (Optional) Dial tone was not received within the time-out period. (Optional) A busy signal was detected. (Optional) The modem has established a connection. This response is used only when the fax mode is selected.
Front Panel Lights (External Modems Only)

Symbol Meaning Status

AA.. Auto Answer
Answer mode: ON when register S0 is set to 1 or higher (Auto Answer), and when answering a call; OFF when modem originates a call. Light flashes when there is an incoming call. CD.. Carrier Detect ON if modem receives a valid data signal (carrier) from a remote modem, indicating that data transmission is possible. Always ON if CD override is ON (&C0). RD.. Received Data Flashes when modem sends result codes or passes received data bits from remote. SD.. Send Data Flashes when computer sends a data bit to modem. TR.. Data Terminal Ready ON if modem receives a DTR signal from computer. Always ON (modem ignores DTR) if the DTR override is ON (&D0).

Symbol

Meaning
Status ON until modem lowers CTS when Transmit Data hardware flow control is enabled (&H1, &H3).
CS.. Clear to Send ARQ/ Error Control/
FAX. Fax Operations. Data Mode: Automatic Repeat Request. ON if modem is set to &M4 or &M5 and successfully establishes an error control connection. Flashes when modem retransmits data to remote modem.. Fax Mode: Flashes to indicate fax mode.. 56K Message Modem: Dual color LED with green indicating 56K Message Modem is enabled and red indicating it is off. Solid green indicates no new messages. Each new message will be indicated by a single slow blink. Fast blinking indicates that the flash memory is full. OH. Off Hook. ON when modem accesses the phone line. Off when modem is On Hook.

The Serial Interface

The serial interface is a standard developed by the Electronic Industries Association (EIA). It defines the signals and voltages used when data is exchanged between a computer and a modem or serial printer. The entire standard covers many more functions than are used in most data communications applications. Data is transmitted between the devices over a shielded serial cable with a 25-pin male (DB-25P) connector to the modem and a 25-pin, 9-pin, 8-pin, or custom-built connector to the computer. Pin assignments are factory-set in the 56K Message Modem to match the standard DB-25 assignments in the following table. DB-9 connectors for IBM/AT-compatible computers should be wired at the computer end of the cable as shown in the DB-9 column. Serial Interface Pin Definitions Signal Source Function Computer/Modem Chassis Ground Both Transmitted Data Computer Received Data Modem Request to Send Computer Clear to Send Modem Data Set Ready Modem Signal Ground Both

DB-25DB-9 Circuit 1 AA BA BB CA CB CC AB 30
DB-25DB-9 Circuit 9 CF SCF CD CE
Function Carrier Detect Speed Indicate Data Terminal Ready Ring Indicate
Signal Source Computer/Modem Modem Modem Computer Modem
*IMPORTANT! In accordance with the ITU standard for V.90 transmissions, this modem is capable of 56 Kbps downloads. However, the download speeds you experience may be lower due to varying line conditions and other factors. Uploads from users to server equipment travel at speeds up to 31.2 Kbps. An analogue phone line compatible with the ITU V.90 standard USRobotics proprietary 56K technology, and an Internet provider or corporate host site with the ITU V.90 standard or USRobotics proprietary 56K technology are necessary for these high-speed downloads.
Windows is a registered trademark of Microsoft Corporation. All other trademarks are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies. Copyright 2007 USRobotics Corporation 1.024.1701-00

Self-Mode Technical Reference

3 March 1999

Self-mode Technical Reference for
Sportster Message Plus / 56K Message Modem 56K Professional Message Modem

Revision 1.03

3Com U.S. Robotics
Self-Mode Technical Reference Revision History

January 98

Description
Revision 1.0 Initial release. All information listed in this document are valid as of the version 11.1.18 of the modem code.(ATi7) Revision 1.01 Addition of specific commands for 56K Professional Message modem valid as of the version 12.1.14.(initial) of the modem code. Addition of specific commands for 56K Professional Message modem valid as of the version 12.2.5. (V.90 upgrade) of the modem code. Addition of specific commands for Sportster MessagePlus/56K Message modem valid as of the version 11.2.2 of the modem code. Revision 1.02 Addition of Fax forwarding commands (+MFF / +MFN) for 56K Professional Message modem valid as of the version 14.2.7 of the modem code. Revision 1.03 Addition of new features integrated to the 56K Message modem second generation valid as of the version 14.8.1 of the modem code.

May 98

November 98

March 99

TABLE OF CONTENTS 1. SELF-MODE COMMAND REFERENCE
1.1 1.2 Introduction General Consideration
2. THE +M (PLUS MESSAGE) COMMAND SCHEME.
2.1 2.2 2.3 New +M Commands +M Command Groups Modem Responses to +M Commands
2.4 +M Command Description 2.4.1 Plus Message Control Group (+MC) 2.4.1.1 +MCA Plus Message Control Auto-answer 2.4.1.2 +MCA? Plus Message Control Auto-answer Query 2.4.1.3 +MCC Plus Message Control Clock 2.4.1.4 Plus Message Control Clock Use 2.4.1.5 +MCC ? Plus Message Control Clock Query 2.4.1.6 +MCD Plus Message Control Dialup Retrieval 2.4.1.7 Plus Message Control Dialup Retrieval Use 2.4.1.8 +MCD? Plus Message Control Dialup Retrieval Query 2.4.1.9 +MCF Plus Message Control Fax Reception 2.4.1.10 +MCF? Plus Message Control Fax Reception Query 2.4.1.11 +MCG Plus Message Control Acoustic Ring 2.4.1.12 +MCG? Plus Message Control Acoustic Ring Query 2.4.1.13 +MCL Plus Message Control Local 2.4.1.14 +MCL? Plus Message Control Local Query 2.4.1.15 +MCM Plus Message Control Monitor 2.4.1.16 +MCM? Plus Message Control Monitor Query 2.4.1.17 +MCP Plus Message Control Password 2.4.1.18 +MCP? Plus Message Password Query 2.4.1.19 +MCR Plus Message Ring Setup 2.4.1.20 +MCR? Plus Message Ring Setup Query 2.4.1.21 +MCS Plus Message Control Switch 2.4.1.22 +MCS? Plus Message Control Switch Query 2.4.1.23 +MCT Plus Message tollsaver. 2.4.1.24 +MCT Plus Message Tollsaver Query 2.4.1.25 +MCV Plus Message Control Voice Reception 2.4.1.26 +MCV? Plus Message Control Voice Reception Query 2.4.1.27 +MCW Plus Message Control Write Settings 2.4.2 Plus Message Erase Group (+ME) 2.4.2.1 +MEA Plus Message Erase All 2.4.2.2 +MEM Plus Message Erase Messages 2.4.2.3 +MEU Plus Message Erase User Sector 2.4.3 Plus Message Fax Group (+MF) 2.4.3.1 +MFI Plus Message Fax ID String 2.4.3.2 +MFI? Plus Message Fax ID String Query 2.4.3.3 +MFF Plus Memory Fax Forwarding Options 2.4.3.4 +MFF? Plus Memory Fax Forwarding Option Inquiry 2.4.3.5 +MFN Plus Memory Fax Forwarding number
Self-Mode Technical Reference 2.4.3.6 2.4.4 2.4.4.1 2.4.4.2 2.4.5 2.4.5.1 2.4.5.2 2.4.6 2.4.6.1 2.4.6.2 2.4.6.3 2.4.6.4 2.4.6.5 +MFN? Plus Memory Fax Forwarding Number Inquiry Plus Message Status Group (+MS) +MSI Plus Message Status Query +MSR Plus Message Status Report Plus Message Transfer Group (+MT) +MTM Plus Message Transfer Messages +MTP Plus Message Transfer Page Plus Message Voice Group (+MV) +MVC Plus Message Voice Capture Outgoing Message +MVD Plus Message Voice Duration Message +MVD? Plus Message Voice Duration Message Query +MVP Plus Message Voice Play Message +MVR Plus Message Voice Record Message

3 March 22 22

Supported in 56K Professional Message Modem and in 56K Message Modem as of code rev 14.8.1 and above.

Parameter:

Disable the +M Auto-answer feature. Enable the +M Auto-answer feature. Report the valid range of command parameters. for test parameter ?. for 0 and 1 parameters.

Information String:

(0,1) None

2.4.1.2 +MCA?

Function: Syntax: Parameter: Information String:
Plus Message Control Auto-answer Query
Report enabled/disabled status of the +M Auto-answer feature. +MCA? None +M Auto-answer feature disabled. +M Auto-answer feature enabled.

2.4.1.3 +MCC

Function:
Plus Message Control Clock
Reset +M clock to 0 days, 0 hours, 0 minutes, 0 seconds. The +M Clock measures time up to 255 days. After modems power up, the +M clock is set to 255 days, 255 hours, 255 minutes, 255 seconds. The +M Clock does not roll over, it saturates at 254 days, 24 hours, 0 minutes, 0 seconds instead. The +M clock has to be reset by the +MCC command in order to start running.
Syntax: Parameter: Information String:

+MCC None None

2.4.1.4 Plus Message Control Clock Use
A real time clock, the +M Clock is implemented in the +M Modem in order to time stamp received messages. The message time stamp is recorded by copying the value of the +M Clock to the message header upon the off hook transition, when an incoming call is answered in +M Mode.
Upon power up the +M clock is in a not initialised state and it is not running. The +M Clock can be reset by an AT command +MCC. The +M Clock reset is required to run the +M clock. The +M clock is running in all modes of the +M Modem. The +M Clock is capable to measure time interval from 0 seconds to 255 days. The +M Clock tick is 2 seconds. The +M Clock does not roll over, the overflow is indicated by reported time of 254 days, 24 hours, 0 minutes and 0 seconds. The +M Clock time reporting is invoked by an AT command +MCC?. The +M clock is not battery backed. If the +M modem power cycles, the clock is set to the not initialised state, which then can be used to indicate the occurrence of a power cycle. The not initialised state is indicated by reported time of 255 days, 255 hours, 255 minutes, 255 seconds. In order to translate the recorded message time stamp value to a meaningful date and time of reception, the DTE application is required to record the actual system time, when the +M Clock is reset by the AT command +MCC. Then the actual date and time of reception of a retrieved message, which is displayed by the application, is computed as the sum of the recorded system date and time and the value of the time stamp of the stored message.

2.4.1.5 +MCC ?

Plus Message Control Clock Query
Report current clock setting. +MCC? None <days>,<hours>,<minutes>,<seconds> <days> , <hours> , <minutes> , <seconds> Number of expired days (000 - 254) since last +MCC reset, consisting of 3 ASCII digits. Separator, ASCII character 02Ch Number of expired hours (000 - 024) since last +MCC reset, consisting of 3 ASCII digits. Separator, ASCII character 02Ch Number of expired minutes (000 - 059) since last +MCC reset, consisting of 3 ASCII digits. Separator, ASCII character 02Ch Number of expired seconds (even numbers 000 - 058) since last +MCC reset, consisting of 3 ASCII digits.

Notes:

The clock increment is 2 seconds, therefore number of expired seconds is even. The response string 255,255,255,255 indicates either missing +M clock initialisation or power cycle occurrence. The response string 254,024,000,000 indicates a 255 day +M clock overflow.

2.4.1.6 +MCD

Plus Message Control Dialup Retrieval
Enable/disable +M Dialup Retrieval Option. +MCD =<iPar> +MCD=? or
Dialup Retrieval Option. Enable the +M Dialup Retrieval Option. Report the valid range of command parameters.
Self-Mode Technical Reference Information String: (0,1) None for test parameter ?. for 0 and 1 parameters.
2.4.1.7 Plus Message Control Dialup Retrieval Use
When enabled, the user can remotely retrieve the stored voice messages through a dialup connection. A user configurable four digits password called the +M Dialup Retrieval Password (+MCP=ijkl), that has to be entered during a dialup retrieval session using the DTMF tones, protect the access. Sending appropriate DTMF signals as control commands controls the progress of a dialup retrieval session. Voice retrieval is entered through the call selection, discussed in the reception mode. Once a DTMF digit is detected during call selection, the +M Dialup Password verification is started. The user has three chances to enter the correct +M Dialup Password. If he fails to enter the correct +M Dialup Password, the call is aborted and the modem goes back on hook. If the correct +M Dialup Password is entered, the modem acoustically indicates the number of present Unchecked Messages (new) including the case of no new messages. The user may then enter the DTMF digit. When there are no more voice messages selected for playback, the modem acoustically indicates the end of currently played message and waits for more DTMF tones for a predefined amount of time. The user can either hang up the +M Modem by DTMF digit * or the +M Modem hangs up automatically after a certain is period of time has expired.
Sportster Message Plus / 56K Message
Repeat indication Playback Messages Playback Messages the acoustic of new messages of all Unchecked / Restarts the of all Stored / Aborts current
56K Message (second generation)

End of Playback or Record Playback of all Unchecked Messages Playback of all Stored Messages Next message

56K Professional Message

(Twice :44) Erase all Fax and (Twice :44) Erase all Fax and Voice Messages Voice Messages. Enable/Disable Fax Fowarding Enable/Disable Fax Fowarding (as of code Rev 14.2.7) Restarts the playback of Restarts the playback of currently currently played voice message played voice message Starts recording Greeting Starts recording Greeting Message Message

Hang-up

Repeat the acoustic indication Repeat the acoustic indication of of new messages count new messages count Hang-up Hang-up

2.4.1.8 +MCD?

Plus Message Control Dialup Retrieval Query
Report +M Dialup Retrieval Option status. +MCD? None +M Dialup Retrieval Option disabled. +M Dialup Retrieval Option enabled.

2.4.1.9 +MCF

Plus Message Control Fax Reception
Function: Enable/disable fax reception and storage in +M Mode. The +M Modem receives and stores fax messages in the +M Memory. If this option is disabled, then no fax messages are received and stored in the +M Mode. Syntax: +MCF =<iPar> +MCF=? Parameter: 0 Disable the fax reception and storage in +M Mode. or
1 Enable the fax reception and storage in +M Mode. ? Report the valid range of command parameters. Information String: (0,1) None for test parameter ?. for 0 and 1 parameters.

2.4.1.10 +MCF?

Plus Message Control Fax Reception Query
Report status of the fax reception and storage in +M Mode. +MCF? None Fax reception and storage in +M Mode disabled. Fax reception and storage in +M Mode enabled.

2.4.1.11 +MCG

Function: Syntax: Parameter:
Plus Message Control Acoustic Ring
Enable/disable and relative volume level of the Acoustic Ring. +MCG=<iPar> 0 Disable Acoustic Ring feature.
Supported in 56K Professional Message Modem only
1 - 255 Enable Acoustic Ring feature with a specific volume level. ? Information String: (0-255) None Note 1: Report the valid range of command parameters. for test parameter ?. for 0 to 255 parameters.
The Acoustic Ring volume level is independent of any volume settings used before an incoming ring was detected. In this way it is assured, that the user will not accidentally miss a Acoustic Ring signal, if the volume is set low before an incoming ring has been detected. For driver compatibility reasons the 56K Message Modem (Second generation : code rev 14.8.1 and up) this command is recognized and will be answered by OK but has no effect.

Note 2:

2.4.1.12 +MCG?
Plus Message Control Acoustic Ring Query
Report status of Acoustic Ring. +MCG? None
Self-Mode Technical Reference Information String: 0 1-255 Acoustic Ring Disabled. Acoustic Ring enabled with a specific volume level selected.

2.4.1.13 +MCL

Plus Message Control Local
Enable/disable the +M Local Mode or report the range of valid +MCL parameters. +MCL=<iPar> +MCL=? or

Parameter

Disable +M Local Mode. Enable +M Local Mode. Report the valid range of command parameters. for test parameter ? if +M Local Mode disabled. for 0 and 1 parameters. for test parameter ? if +M Local Mode enabled

(0,1) None None

There is no OK response qualifier to +MCL=1 command.

2.4.1.14 +MCL?

Plus Message Control Local Query
Report current enabled/disabled status of the +M Local Mode. +MCL? None +M Local Mode disabled. +M Local Mode enabled.
There is no OK response qualifier to if +M Local Mode enabled.

2.4.1.15 +MCM

Plus Message Control Monitor
Function: Enable/disable +M Call Monitor Option. When enabled, then all audio signals present on the phone line during an answer session in the +M Mode are routed to the external speaker connector in addition to all standard signal routing. Syntax: +MCM=<iPar> +MCM=? Parameter: ? Information String: (0,1) None Disable the +M Call Monitor Option. Enable the +M Call Monitor Option. Report the valid range of command parameters. for test parameter ?. for 0 and 1 parameters. or

2.4.1.16 +MCM?

Plus Message Control Monitor Query
Report the enabled/disabled status of the +M Call Monitor Option. +MCM? None
Self-Mode Technical Reference Information String: Monitor Option disabled. Monitor Option enabled.

2.4.1.17 +MCP

Plus Message Control Password
Set up and store the +M Dialup Password. The +M Dialup Password consists of 4 digits. +MCP=<4 digit string> +MCP=? or

<4 digit string> ?

Set +M Dialup Password to the string of four digits. Report the range of valid characters for the +M Dialup Password formatted as in TIA/EIA-592 (Class 2.0 Fax). For test parameter ?. ASCII characters from 030h to 039h allowed in the +M Dialup Password. for <4 digit string>.

(30-39) None

2.4.1.18 +MCP?
Plus Message Password Query
Report the current setting of the +M Dialup Password. +MCP? None <Four ASCII coded digit string> None if the +M Dialup Password is set up. if the +M Dialup Password is not set up.

2.4.1.19 +MCR

Plus Message Ring Setup
Set up the number of incoming RINGs before answering in the +M Mode. +MCR=<iPar> +MCR=? or
Answer in +M Mode after the third detected ring. Answer in +M Mode after the fourth detected ring. Answer in +M Mode after the fifth detected ring. Answer in +M Mode after the sixth detected ring. Report the valid range of command parameters. for test parameter ?. for 3 to 6 parameters.

(3-6) None

2.4.1.20 +MCR?
Plus Message Ring Setup Query
Report current settings for the number of RINGs before answering in the +M Mode. +MCR? None Set to answer in +M Mode after the third detected ring. Set to answer in +M Mode after the fourth detected ring.
Self-Mode Technical Reference Set to answer in +M Mode after the fifth detected ring. Set to answer in +M Mode after the sixth detected ring.

2.4.1.21 +MCS

Plus Message Control Switch
Supported in Sportster Message Plus and 56K Message Modem only NOT supported in 56K Message Modem with code revision 14.8.1 and above. Function: Syntax: Enable/disable the Self-Mode Feature functionality. +MCS=<iPar> +MCS=? Parameter: ? Information String: (0,1) None Disable the +M functionality. Enable the +M functionality. Report the valid range of command parameters. for test parameter ?. for 0 and 1 parameters. or
Note 1 : The command ATZ is also supported in +M mode. It is intended to let the Non-+M-aware softwares the possibility to use the +M as a regular Voice/Fax modem. It reverts the +M to off-line data command mode (therefore disabling the Self-mode) and loads the &F1 factory profile into the +Ms RAM. This command SHOULD NOT be used to disable Self-mode by a +M-aware application. +MCS=0 shall preferably be used for this purpose. Note 2 : The 56K Professional Message modem will reply OK to this command for compatibility purposes, but the command will be ignored. The +MCA command should be used instead.

2.4.1.22 +MCS?

Plus Message Control Switch Query
Supported in Sportster Message Plus and 56K Message Modem only NOT supported in 56K Message Modem with code revision 14.8.1 and above. Function: Syntax: Parameter: Information String: Report current enabled/disabled status of the +M Features functionality. +MCS? None Self-Mode Feature functionality disabled. Self-Mode Feature functionality enabled.
2.4.1.23 +MCT Plus Message tollsaver.
Supported in 56K Professional Message Modem only Function: Syntax: When enabled modem will answer after following number of rings if new voice message is present in flash memory. +MCT=<iPar> +MCT=? Parameter: 0 Disable the +M Tollsaver or

Plus Message Erase User Sector
Clear the partition of the +M Flash Memory, which contains the user configurable settings and information. +MEU None None
2.4.3 Plus Message Fax Group (+MF) 2.4.3.1 +MFI
Plus Message Fax ID String
Set up and store the T.30 compliant +M Fax ID String for fax reception in +M Mode. The +M Fax ID String consists of up to 20 ASCII characters from 020h (space) to 060h (), and from 07Bh ({) to 07Eh (~). +MFI=<+M Fax ID String> or +MFI=? <+M Fax ID String> ? Set +M Fax ID String to the string of up to twenty printable ASCII characters within. Report the range of valid characters for the +M Fax ID String, formatted as in TIA/EIA-592 (Class 2.0 Fax) Here for up to twenty printable ASCII characters the response string is (207E) for test parameter ?. ASCII characters from 020h to 060h, and from 07Bh to 07Eh allowed in the Fax ID String. for <+M Fax ID String>.

Syntax: Parameter:

(20-60,7B-7E) None

2.4.3.2 +MFI?

Plus Message Fax ID String Query
Report the current setting of the local fax ID string. +MFI? None
Self-Mode Technical Reference Information String: <+M Fax ID String>

2.4.3.3 +MFF

Plus Memory Fax Forwarding Options
Only supported in 56K Professional Message Modem with code revision 14.2.7 and above Only supported in 56K Message Modem with code revision 14.8.1 and above. Function: Syntax: This command changes bitmapped registers settings to turn on and off following features in fax forwarding. +MFF or +MFF=<iPar> or +MFF=? Bit 0 Enables/disables fax forwarding feature. =0 disables the fax forwarding feature =1 enables the fax forwarding feature Enables/disables blind dialing =0 disables the blind dialing =1 enables the blind dialing. Enables/disables speaker during the fax forwarding option =0 speaker is turned on during the fax forwarding mode. =1 speaker is turned off during the fax forwarding mode. Undefined. Disable the fax forwarding option in SR Mode Disable the fax forwarding option in SR Mode. Enable the fax forwarding option in SR Mode with blind dialing disabled and speaker is turned on. Enables the fax forwarding option with blind dialing enabled and speaker is turned on. Enables the fax forwarding option with blind dialing disabled and speaker is turned off. Enables the fax forwarding option with blind dialing enabled and speaker turned off Response to the command test parameter ?.

Bit Information

Bit 3 to 15 Parameter: None 0 ,2,4,7 Response: (0-7)

2.4.3.4 +MFF?

Plus Memory Fax Forwarding Option Inquiry
Only supported in 56K Professional Message Modem with code revision 14.2.7 and above. Only supported in 56K Message Modem with code revision 14.8.1 and above. Function: Syntax: Parameter Response: Report Enabled/Disabled status of the fax forwarding option in SR Mode +MFF? None 0,2,4,6 1,3,5,7 Fax Forwarding option disabled. Fax Forwarding option enabled.

2.4.3.5 +MFN

Plus Memory Fax Forwarding number
Only supported in 56K Professional Message Modem with code revision 14.2.7 and above. Only supported in 56K Message Modem with code revision 14.8.1 and above.
Self-Mode Technical Reference Function:
Set up and store the Fax Forwarding Number. The Fax Forward Number consists of up to 20 digits. You can also tell dialing mode, Pulse or Tone by adding P or T in front of numbers, like +MFN=P96767311 or +MFN=T3859213. +MFN +MFN=<Fax number > or +MFN=? none Fax forward number is uninitialised Sets up to 20 digits of forwarding number. ? Report the valid range of digits. Response to the command test parameter ?.
Parameter: <Fax FWD Number>

Response:

2.4.3.6 +MFN?
Plus Memory Fax Forwarding Number Inquiry
Only supported in 56K Professional Message Modem with code revision 14.2.7 and above. Only supported in 56K Message Modem with code revision 14.8.1 and above. Function: Syntax: Parameter: Response: Report the current fax forwarding number saved in memory. +MFN? None <Zero to twenty digits>
2.4.4 Plus Message Status Group (+MS) 2.4.4.1 +MSI
Plus Message Status Query
Generate the +M Information Screen in a user friendly format. The +MSI command is intended for displaying of the +M Memory information on a terminal screen. The +MSI command is not intended for providing information to the +M Application. The +M Information Screen contains the administrative information about the Stored Messages.
+MSI None String of printable ASCII characters. Formatting and content is subject to change.

2.4.4.2 +MSR

Plus Message Status Report
Report the status information of the +M Flash Memory and Stored Messages in a computer friendly format. The +MSR command is intended for providing the +M information to the DTE application.
+MSR=<iPar> 0 Report general status of the +M Memory. The data reported are total +M Memory space, percentage of used +M Memory space, number of voice Unreleased Messages, number of voice Stored Messages, number of fax Unreleased Messages, number of fax Stored Messages, presence of +M Outgoing Message and +M Memory Full Messages.
Self-Mode Technical Reference 1 to 255
Report message status of the specified Stored Message. The data reported are message index, message type, voice message duration or fax size in pages, message +M status flags, message reception status, message time stamp, message Caller ID, page and address of message beginning in the +M Memory, and the checksum of the information string.
String of eight ASCII coded 3-digit numbers separated by commas for the parameter 0: <+M Memory Size> , <% of used space> , <# of stored voice messages> , <# of unreleased voice messages> , <# of stored fax messages> , <# of unreleased fax messages> , <Presence of +M Outgoing Message> , <Presence of +M Memory Full Message> Example: 002 for 2 Mbytes of +M Memory. Separator ASCII 02Ch. 000 to 100 for percentage of used +M Memory. Separator ASCII 02Ch. 000 to 255. Separator ASCII 02Ch. 000 to 255. Separator ASCII 02Ch. 000 to 255. Separator ASCII 02Ch. 000 to 255. Separator ASCII 02Ch. 000 for not present, 001 for present. Separator ASCII 02Ch. 000 for not present, 001 for present.

Example:

The string 003,001,003,252,000,001,015,030,(847)676-7010 ,005,089,145,230 is for message number 3, which is a fax with 3 pages, that has been already transferred to the DTE, that was correctly received 1 day, 15 hours and 30 minutes after the latest +M Clock reset (+MCC), from the station with Fax ID (847)676-7010. In the memory dump +MTM the message starts at location 0D991h after all checksum bytes have been discarded (memory dump starts with page 4). The checksum of the response string is 0E6h.
2.4.5 Plus Message Transfer Group (+MT) 2.4.5.1 +MTM
Plus Message Transfer Messages
Start transfer of binary data of all messages, that are stored in the +M Memory starting with the lowest +M Memory page #4. When all binary data from the pages, that contain stored messages, is transferred, the modem sends the response qualifier OK. Before each 32kB block of binary data-to-be-transferred, two ASCII coded bytes are transferred, that correspond to a simple byte long checksum of the 32kB block of binary data-to-betransferred. If after the transmission of binary data from all pages with stored messages the DTE cannot find a match between a computed checksum of any 32kB block of binary page data and the ASCII coded checksum of that 32kB block of binary data sent from the +M Modem, the DTE can request a retransmission of only the corrupted 32kB block of binary page data by the +MTP command.
+MTM None If there is at least one stored message in the +M Memory, following string is sent: <ASCII coded upper nibble of a byte-long checksum of following 32kB of page #4 data> <ASCII coded lower nibble of a byte-long checksum of following 32kB of page #4 data> <32kB of page #4 stored message data> <ASCII coded upper nibble of a byte-long checksum of following 32kB of last page data> <ASCII coded lower nibble of a byte-long checksum of following 32kB of last page data> <32kB of last page with any stored message data>. None if there is no stored message in the +M Memory.

2.4.5.2 +MTP

Plus Message Transfer Page
Start transfer of binary data stored in a specified 32kB +M Flash Memory page. Before the 32kB block of binary data-to-be-transferred, two ASCII coded bytes are transferred, that correspond to a simple byte long checksum of the 32kB block of binary data-to-be-
sent. Then the 32kB block of binary data from the specified +M Flash Memory page is transferred followed by the OK response qualifier. +MTP command can be used to obtain the data from the two User Sector pages 0 and 1, that contain the +M Dialup Password, +M Fax ID String, +M Outgoing Message and +M Memory Full Message, that is not part of the data transmitted by the +MTM command. Syntax: Parameter: Information String: +MTP=<iPar> 0 - 63 Number of the +M Memory page from which the data should be transferred.

<ASCII coded upper nibble of a byte-long checksum of 32kB of page #n data> <ASCII coded lower nibble of a byte-long checksum of 32kB of page #n data> <32kB of page #n data>
2.4.6 Plus Message Voice Group (+MV) 2.4.6.1 +MVC
Plus Message Voice Capture Outgoing Message
Capture the subsequent data stream from the DTE and store it in the +M Flash Memory either as the +M Outgoing Message or as the +M Memory Full Message. The data stream has to be terminated by the DLE ETX sequence. The data stream has to be smaller than the storage space allocated in the +M Memory. After the +MVC=<iPar> command is issued, the DTE shall wait for a CONNECT response from the +M Modem before the data transfer is commenced. If no data is received within 5 seconds after the CONNECT response was generated, or if the data stream is interrupted for more than 5 seconds for reasons other than activated transmit flow control, the +M Capture Mode is aborted, all received data is discarded, and the original data is preserved. If the amount of data sent from the DTE becomes larger than the space allocated in the +M Memory for the specified outgoing message, the +M Capture Mode is aborted, and all received data is discarded, and the original data is preserved.
+MVC=<iPar> Capture +M Outgoing Message. Capture +M Memory Full Message.

2.4.6.2 +MVD

Plus Message Voice Duration Message
Specify the duration in seconds of the received voice messages. +MVD=<iPar> Do not limit duration of received voice messages. 254Limit duration of received voice messages to the number of seconds equal to parameter value. Do not limit duration of received voice messages. Legacy of +M Application with no +MVD support.

2.4.6.3 +MVD?

Plus Message Voice Duration Message Query
Report current setting of the received messages duration. +MVD?
Self-Mode Technical Reference Parameter: Information String: None 0 Unlimited duration of the received voice messages.
1 - 254 Duration of received voice messages in seconds. 255 Unlimited duration of the received voice messages.

2.4.6.4 +MVP

Plus Message Voice Play Message
Play back the specified voice message through the external speaker. +MVP=<iPar> 0 Play +M Outgoing Message.
1 -254 Play the message with index equal to parameter. 255 Information String: None Play +M Memory Full Message.

2.4.6.5 +MVR

Plus Message Voice Record Message

Record the specified +M outgoing message through the internal microphone and store it in the +M Memory. The recording is terminated either by a key press abort, or if the size of the recorded +M message exceeds the space available for its storage in the +M Memory. +MVR=<iPar> Record and store +M Outgoing Message Record and store +M Memory Full Message None

3. Flash Memory

The total memory space available for the Self-Mode Feature is 2MB (2097152 bytes). The flash memory space is divided into 32 equally large sectors of 64kB (65536 bytes), that can be individually erased. The first sector, the User Sector, is used for storage of user configurable data, which are required for +M Options. The nature of the flash memory requires to allocate one extra sector as a mirror to the User Sector, so the information fields in the User Sector can be updated independently. This extra sector is called the Mirror Sector and is located right after the User Sector. The remaining 30 sectors, called Data Sectors, are used for storage of the incoming messages. The Data Sectors represent 93.75% of the capacity of the +M Memory.
Table 1 Partitioning of +M Memory

Sector Name

User Sector
Physical Address Range 000000h 00FFFFh

Stored Data Fields

Field Length
Mirror Sector Data Sectors
010000h 01FFFFh 020000h 1FFFFFh
+M Outgoing Message +M Memory Full Message +M Fax ID String +M Dialup Retrieval Password Free Mirror of User Sectors data fields Variable length messages
8000h 7F00h 0014h 0004h 00E8h

3.1 User Sector

The User Sector holds the data for the +M Dialup Retrieval Password, the +M Fax ID String, the +M Outgoing Message, and the +M Memory Full Message in separate fields. The +M Outgoing Message is stored in 32768 bytes of contiguous space in the User Sector. This corresponds to approximately 15 seconds of GSM encoded audio signal. The +M Memory Full Message is stored in 32512 bytes of contiguous space in the User Sector. This corresponds to approximately 15 seconds of GSM encoded audio signal. 1. 2. 3. The +M Fax ID String is stored in 20 bytes of contiguous space. The +M Dialup Retrieval Password is stored in 4 bytes of contiguous space. The remaining 232 bytes are for future additions.

3.2 Mirror Sector

This sector is used when the information in the User Sector is being updated, since every of the separate data fields in the User Sector must be able to be updated independently. The information in the User Sector is updated in five steps: 1. 2. The Mirror Sector is erased. The new data is written into the respective blank fields in the Mirror Sector.

Self-Mode Technical Reference 3. The information from the User Sector is transferred to the Mirror Sector, except of the fields already updated in the Mirror Sector. 4. The User Sector is erased. 5. The information from the Mirror Sector is transferred to the User Sector It should be noted, that the five steps can take up to twenty seconds to execute.

3.3 Data Sectors

The Data Sectors represent a contiguous memory space of approximately 2MB (1966080 bytes), where the incoming messages are stored. The Data Sectors are all erased at the same time, no selective erasure is provided for.
4. Format of Messages Stored in the +M Memory
Received messages are stored in form of records, sequentially from the first data sector to the last one. Because the received messages vary in size significantly, they are stored in records of variable size, so the available memory space is used efficiently. To ease the navigation within the +M Memory, each record will contain a fixed size header field with administrative information, and a variable size data field, where the captured message is stored.

4.1 Header Field

The 34 bytes long fixed size Header Field contains main characteristics of the stored message and information related to its management.
Table 2 Sections in Header Field
Parameter Name Message Index
Purpose Message reference number Type of message data

Size 1 byte

Values 0 1-4-Type fax 0 1-Type voice 0 1-Bit 0 Bit 1 Bit 2-1-0-254,255 0-23,255 0-59,255 Invalid Valid Not set Undetermined Fax Voice Data Undetermined Not set Number of pages Undetermined Valid Not set Length in seconds Undetermined Valid Not set H Unreleased L Released H Unchecked L Checked X Not used OK ERROR (Code) Not set Number of days, uninitialized Number of hours, uninitialized. Number of minutes, uninitialized.

Message Type

1 byte

Message Information

Information related to specific message type

Message Attributes

Retrieval related management flags Status of message reception Time expired between last +M clock reset and message reception Fax ID of the received fax message sender Address of the beginning of previous message