FCC compliant telephone cords and modular plugs are provided with this equipment. This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack, which is Part 68 compliant. See installation instructions for details. The REN is useful to determine the quantity of devices that may be connected to the telephone line. Excessive REs on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of REs of all devices that may be connected to a line, as determined by the total RENs, contact the local telephone company. If your ViewStation causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. However, if advance notice is not practical, you will be notified as soon as possible. You will be advised of your right to file a complaint with the FCC if you believe it is necessary.
Your telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the operation of your equipment. If they do, you will be given advance notice so as to give you an opportunity to maintain uninterrupted service. If you experience trouble with this equipment, ViewStation, please contact your equipment provider for repair/warranty information. If your equipment is causing harm to the telephone network, the telephone company may request that you disconnect the equipment until the problem is resolved. There are no user-serviceable parts inside the videoconferencing unit, remote control, microphone pod, or power supply. This equipment may not be used on a public coin service provided by the telephone company. Connection to party lines is subject to state tariffs. Contact your state public utility commission or corporation commission for information.
Underwriters Laboratories Statement
The system is intended to be powered only by the accompanying power supply unit.
CE Mark R&TEE Directive:
This ViewStation and ViewStation product line has been marked with the CE mark. This mark indicates compliance with EEC Directives 89/336/EEC, 73/23/EEC 1999/5/EC. A full copy of the Declaration of Conformity can be obtained from Polycom Ltd. 270 Bath Road, Slough UK, SL1 4DX.
Declaration of Conformity:
Hereby, Polycom, Ltd. declares that this ViewStation and ViewStation product line is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.

Konformitetserklring:

Hermed erklrer Polycom, Ltd., at indestende ViewStation and ViewStation product line er i overensstemmelse med de grundlggende krav og de relevante punkter i direktiv 1999/5/EF.

Polycom, Inc.

System Information and Diagnostics
System Information... 171 Diagnostics... 172 Network Stats... 173 Advanced Stats... 173 Call Status... 173 Color Bar... 174 Audio.... 174 Near End Loop... 174 Far End Loop.... 174 Reset System... 175

Troubleshooting

General Problems.... 177 Audio.... 178 Video.... 180 Network and Communications... 182 IMUX.... 184 LAN/Intranet.... 185 Presentations.... 186 System Control.... 188
Network Address Translation
Before You Start Configuring NAT.. 189 Setting up NAT.... 189
Video and Audio Input and Output Levels
Video Levels.... 191 Video Output Levels... 191 Video Input Levels... 191 Audio Levels.... 191 Audio Output Levels... 191 Audio Input Levels... 192
V.35 Technical Information
General V.35 Information... 193 Serial Interface Control Signals... 193 State Machine... 194
Dial Out State Machine... 194 In-bound Call State Machine... 195 Nondialed User-Initiated Call State Machine.. 197 Nondialed Network-Initiated Call State Machine.. 198 Crypto Resync... 199 V.35 Cabling Diagram and Schematic.. 200

ISDN Information

Sample NT-1 Settings... 203 ISDN Switches.... 205 ISDN Errors.... 205
Optional Equipment Configuration
StreamStation Configuration... 211 Using a ShowStation IP.... 213

Glossary

ABC.... 215 DEF.... 218 GHIJK.... 221 LMN.... 224 OPQ..... 225 RST.... 226 UVW..... 227 XYZ.... 228

Index....229

Thank you for purchasing a Polycom ViewStation! Soon you will discover that video communications using the ViewStation is easy, fun, and productive. Polycom ViewStations are the most easy to use video communications systems on the market today. This User Guide provides information about setting up and using the following Polycom ViewStation products: ViewStation H.323 with stand-alone IP ViewStation H.323 with a Quad BRI network interface module ViewStation 128 with single ISDN ViewStation H.323 with a V.35 network interface module ViewStation H.323 with Avaya DCP network interface module ViewStation MP ViewStation with Quad BRI or Avaya DCP with Multi-Point enabled software.
If you purchased a ViewStation SP or ViewStation SP384, see the ViewStation SP or SP384 User Guide. If you purchased a ViewStation FX or VS4000, see the ViewStation FX and VS4000 User Guide. Each ViewStation product has a document called a QuickStart card, which is shipped in the box with your ViewStation. The QuickStart card illustrates how to connect the required cables and optional equipment to the ViewStation.

ViewStation Basics

The Graphic User Interface (GUI) is designed for ease of use. The following table is a definition of key icon functions:

Icon Name

Function

For more information about GMS software, see the Polycom Web site at www.polycom.com.
Using Multi-Point Address Book Entries
Adding multi-point entries into the ViewStation MP address book or the GAB allows the ViewStation to call several sites at one time using one address book entry. If you delete a single site entry from the address book and that entry is part of a multi-point address book entry, the multi-point address book entry is automatically deleted from the address book.
Creating a multi-point address book entry:
1. From the Main Menu, highlight the Address Book icon and press the SELECT button on the remote control. The Speed Dial screen is displayed. 2. Highlight the Address Book icon on the Speed Dial screen and press the SELECT button again. The Address Book screen is displayed. 3. Using the ARROW buttons on the remote control, select the New icon and press the SELECT button on the remote control. The New Address Book Entry screen is displayed. 4. Select the Multi-Site icon and press the SELECT button on the remote control. The Multi-Site Meeting screen is displayed. 5. Using the on-screen keyboard, enter a name for the meeting in the Name field. 6. Select a dialing speed for the call. The ViewStation dials all of the sites in the multi-point call at the speed you specify regardless of the dialing speed set for the individual address book entries. 7. To add entries from the address book to the multi-point address book entry, click the Add icon. The Add To Meeting screen is displayed. 8. Select the address book entry you want to add and press the SELECT button on the remote. The Multi-Site Meeting screen is displayed with the added entry. 9. Repeat steps 7 and 8 until you have specified all of the sites for the multi-point address book entry. 10. Click the Save icon and press the SELECT button on the remote control. The Address Book screen is displayed.
Placing a Video Call Using the Address Book
The ViewStations address book provides a fast and easy way to place a call, and to store names and numbers. To place a video call using the address book: 1. From the Main Calling screen, select the Address Book icon and press the SELECT button on the remote control. The Speed Dial screen is displayed. 2. From the Speed Dial screen, select the Address Book icon. The Address Book screen is displayed when the SELECT button on the remote control is pressed.

Figure 3-13. Address Book Screen
3. On the Address Book screen, select the entry to be dialed using the remote control. To easily access the address book entries, select the letter (and number) on the remote control that corresponds to the first letter of the name of the person or party you wish to call. For example, to locate Mr. Thomas, press the number 8 on the numeric keypad of the remote control. The letter T corresponds to the number 8 on the telephone. When 8 is selected, the ViewStation displays the T section of the address book. Press the SELECT button on the remote control to place the call. The ViewStation automatically dials the number. 4. The call name, number, and call speed are displayed at the top of the screen. On the lower left side of the screen, a call progress indicator shows the connection progress. The indicator changes from blue to yellow to orange, and finally to green when the call completes.
Placing a Video Call from the Web Interface
Placing a call from the Web inferface can only be done if the ViewStation is connected to a PC. See Placing a Call from the ViewStation Web Interface on page 150.
Placing Telephone Calls with the ViewStation
In countries that use the North American POTS standard, connect an analog telephone line to the back of the ViewStation. With a POTS line, you can use the ViewStation to: Make an audio telephone call Add a third-party audio call to a video call Add a video call while in an audio telephone call
The following sections describe how to make these calls

Placing a Telephone Call

To place a telephone call using the ViewStation, the ViewStation must first be connected to a standard POTS or PBX wall jack. See the ViewStation Quickstart card for more information. To make a call: 1. From the Main Calling screen, highlight the Telephone icon and press the SELECT button on the remote control. The Telephone screen is displayed.
Figure 3-14. Telephone Screen
2. Using the numeric keypad on the remote control, enter the phone number of the party to be called. If dialing within a PBX system, enter the extension number typically used within your PBX system.
To delete the right-most digit, press the LEFT ARROW button on the remote control. To clear all information in the number field, use the ARROW buttons on the remote control and select the CLEAR button. 3. To place the call, press the CALLHANG-UP button on the remote control. If you only hear the numbers being dialed and no one answers or there is no dial tone, make sure you have the telephone cable properly connected to the back of the ViewStation. 4. To disconnect from the call, press the CALLHANG-UP button on the remote control. The phone image appears to be on-hook.

Answering a Video Call

There are two separate modes for answering video calls:

For Windows NT 4.0: a. Right-click the Network Neighborhood icon, and then right-click Properties. b. When the Network screen appears, select the Protocols tab, then double-click TCP/IP Protocol. c. Select the IP Address tab. Make sure the OBTAIN AN IP ADDRESS AUTOMATICALLY button is selected. Then click OK.
For Windows 2000: a. Right-click the My Network Places icon, and then right-click Properties. b. In the Network and Dial-up Connections window, right-click Local Area Connection, and select Properties. c. In the Local Area Connection Properties window, double-click Internet Protocol (TCP/IP).
d. In the Internet Protocol (TCP/IP) Properties window, make sure the OBTAIN AN IP ADDRESS AUTOMATICALLY button is selected. Then click OK. Note The ViewStation must be powered on when connecting the PC to the LAN via the ViewStation.
Figure 4-2. Network Screen for Windows 9.X
Connecting The ViewStation to a Stand-Alone PC
Figure 4-1-c illustrates a configuration in which neither the ViewStation nor the PC has access to an Ethernet LAN. For example: For an ISDN-configured ViewStation where H.323 videoconferencing is not used.
This configuration is NOT recommended when connecting to an Ethernet LAN in which an external DHCP server is used. 1. Connect the orange-tipped RJ-45 cable connector to the orange RJ-45 port on the ViewStation. 2. Connect the opposite end of the orange-tipped RJ-45 cable to the RJ-45 port to the Ethernet port on the PC. 3. Power on the ViewStation. 4. Configure the ViewStation DHCP setting (System Info > Admin Setup > LAN/H.323 > LAN & Intranet). Select SERVER in the DHCP field. The ViewStation becomes a DHCP server and provides IP addresses for up to 12 PCs. Note If the DHCP server option is not available on your ViewStation, you must update your ViewStation through an H.320 call or connect the ViewStation to a LAN and run the SoftUpdate application on the ViewStation and check Enable system to be a DHCP server.
5. The ViewStation prompts you to save changes. 6. Go to the System Information screen (System Info) and verify the ViewStation IP address. (1.1.1.2) 7. The following message appears in a dialog box: The system will now issue IP addresses to other PCs in the LAN. Continue Yes or No? Choose Yes then exit the screen by selecting the Menu icon. The ViewStation automatically restarts. If you choose No, your changes are not saved. 8. Complete the following steps on your PC to finish configuration: For Windows 9X/NT: Right-click on the Network Neighborhood icon for on your Windows desktop and select Properties from the menu. The Network dialog box appears. For Windows 2000/ME: Right-click on the My Network Places icon for on your Windows desktop and right click on Local Area Connection. 1. The Network dialog box appears. (The screen in Figure 4.3 is for Windows 2000 operating system. Your operating system may display this information differently.)

Figure 4-3. PC TCP/IP Network Screen
2. The Primary Network Logon as shown in Figure 4-3: Select Windows Logon, otherwise the ViewStation does not assign an IP address to the PC. Note Individual network configurations may vary with the topography of the network used. Check with your Information Systems manager for assistance. 3. Highlight TCP/IP and select properties. 4. On the IP Address or General tab, select the Obtain An IP Address Automatically option and click on OK.
Figure 4-4. TCP/IP Properties Screen
5. Restart your PC and launch Internet Explorer.
Using the ViewStation Web Interface
All ViewStation models come with an embedded Web interface that offers the following options to ViewStation users: Select and View a Presentation see page 139 Closed Caption see page 146 Using Microsoft NetMeeting see page 147 System Information and Remote Management see page 149
Select and View a Presentation
The ViewStation lets you view and present Microsoft PowerPoint 97 and 2000 presentation slides when it is connected to a PC (via LAN or direct). You can conduct a presentation on the ViewStation or you can watch a presentation from a PC. All that is required is the IP address of one of the ViewStations in the videoconference.
Figure 4-5. Select a Presentation Screen
To present a slide to a ViewStation, complete the following steps: On the PC: Launch Internet Explorer 4.0/5.0 or Netscape 4.5 or higher. Note Ensure the browser is configured to accept cookies.
1. Enter the IP address of the ViewStation displaying the slides. The Welcome page appears. 2. Click the Select a Presentation icon. The Select a Presentation for Viewing page appears. 3. Click the PRESS HERE TO SELECT A POWERPOINT PRESENTATION button. The pcPresent dialog box appears.
Figure 4-6. pcPresent Screen
4. Enter a name and password if one has been established for the videoconference. Note If the security level on the Internet browser is set too high, you cannot bypass the password. If this occurs, change the security level to low or medium.
5. Click the PLEASE PRESS HERE TO SELECT A POWERPOINT PRESENTATION button. The File Open dialog box appears.
Figure 4-7. Open Presentation Screen
6. Select a presentation file and click on the pcPresent button. A window appears indicating that your slides are being converted to thumbnail sketches. Once this is complete, the thumbnails are loaded into the ViewStation flash memory. Note The maximum slides per presentation is 100.
Figure 4-8. Converting PowerPoint Slides Screen
This feature enables the ViewStation to hold the slides active in active memory if the videoconference connection is
lost. The slides remain in the ViewStation as long as they are active on the ViewStation Web interface. Note The ViewStation can load up to eight presentations in memory.

On the ViewStation: 1. Press the SLIDES button on the remote control. The Available Presentations screen appears.
Figure 4-9. Available Presentations Screen
2. Select a presentation and press the SELECT button on the remote control. A password may be required to proceed.
Figure 4-10. Loading Slides Screen
The Loading Sides screen shown in Figure 4-10 appears when a presentation selection has been made. 3. A thumbnail of each slide provides the presenter with a preview of all the slides simultaneously. To view a slide, highlight a slide and press the SELECT button on the remote control.
Figure 4-11. Thumbnail of Slides in the Presentation Directory
Press the INFO button for additional information about the slide being viewed. The name of the presentation appears, as well as the slide number and the viewing password. Passwords for slides may be changed on this screen. This affects the entire presentation to all viewers.
Figure 4-12. Slide Presentation Information Screen
4. Use the ARROW buttons on the remote control to move backward and forward through a presentation. Use the following table to navigate the presentation menu for the ViewStation: Button UP ARROW DOWN ARROW LEFT ARROW RIGHT ARROW MENU SELECT SLIDES Action Goes to the beginning of the presentation. Goes to the end of the presentation. Moves the highlight marker to the left. Moves the highlight marker to the right. Switch between viewing a thumbnail and viewing the full slide. Return to live video or select a slide from thumbnails. Select another presentation.
Sending Snapshots to the ViewStation
ViewStations with an additional camera(s) can send a snapshot for any camera connected to the ViewStation by pressing the SNAPSHOT button on the remote control. Complete the following to send a snapshot to the ViewStation: 1. Press the SNAPSHOT button on the remote control. 2. Select the desired camera (1, 2, or 3.) 3. Press the SNAPSHOT button again to send the snapshot to the ViewStation. 4. Press the SNAPSHOT button again to return to live video.
Viewing Snapshots from the ViewStation
Up to 12 users can view ViewStation snapshots by completing the following steps: 1. Open a web browser. 2. Enter the IP address of the ViewStation in the browser address bar. 3. Select View a Presentation. 4. Enter the user name (and password if required).

Send Message

The Restart System icon is used to reboot the ViewStation after changes are made to the configuration settings. Restart System
System Info > Admin Setup > Video Network > IMUX > Numbers ISDN ViewStations Only ISDN Numbers System Info > Admin Setup > Video Network > IMUX > SPIDS ISDN ViewStations Only SPIDs
System Info > Admin Setup > Video Network > IMUX > Audio Quality BRI / DCP ViewStations Only Audio Quality System Info > Admin Setup > Video Network > IMUX > Dialing Speeds or System Info > Admin Setup > LAN/H.323 LAN/Intranet > Dialing Speeds
System Info > Admin Setup > Video Network > Call Preference Call Preference
The ISDN Trace icon is used to diagnose the condition of each ISDN line. ISDN ViewStations Only ISDN Trace
System Info > Admin Setup > Video Network > Advanced V.35 Setup ViewStations with V.35 Only V.35 Setup
System Info > Admin Setup > Video Network > IMUX > Advanced Dialing DCP, ISDN, and V.35 ViewStations Only Advanced Dialing
System Info > Admin Setup > LAN/H.323 > LAN/Intranet

LAN/Intranet

System Info > Admin Setup > Video Network > Video Network V.35 Video Network
System Info > Admin Setup > LAN/H.323 > H.323
System Info > Admin Setup > Global Management Global Management System Setup
System Info > Admin Setup > Global Address > Global Address Global Address Book
System Info > Admin Setup > Global Address > Global Address > Server Server
System Info > Admin Setup > Global Address > Global Address > Preferences Preferences
System Info > Admin Setup > Global Address > Global Address > Private NET Private Numbers
System Info > Admin Setup > Global Address > Global Address > Gateway Number Gateway Number
System Info > Admin Setup > Global Address > Global Address > Dialing Rules 1 Dialing Rules 1
System Info > Admin Setup > Global Address > Global Address > Dialing Rules 2 Dialing Rules 2

Upgrading Software over the LAN
You can use the SoftUpdate application to upgrade your software over the LAN. Complete the following steps to upgrade your ViewStation software: 1. Download the latest software from www.polycom.com and save it on your PC. If you do not have internet access, your reseller can supply you with the application. 2. Double-click on the software zip file and select a directory from which you want the files extracted. If you are prompted for a password, contact your network administrator. 3. Once the application is extracted, double-click on the SoftUpdate.exe file. The SoftUpdate dialog box appears.
Figure 4-19. Software Update Screen
4. Click on the SOFTUPDATE button. The IP Address dialog box appears. 5. Enter the IP Address of the ViewStation you want to update and an administrator password, if one is required. Click OK. A System Info dialog box appears.
Figure 4-20. System Information Dialog Box
6. Click on the CONTINUE button to start the update process. During the update, complete the following: a. Print and read the Read Me First file. b. Periodically look at the progress of the update. See "Network and Communications" on page 182 if this process appears to be inactive after 10 minutes. c. When the SoftUpdate is complete, click OK to close the SoftUpdate application.

Using Visual Concert PC

ViewStation release 7.0 software and above supports Visual Concert PC. Visual Concert PC is an adaptor that lets you simultaneously send a live screen image from the PC to your Polycom ViewStation conferencing system. The live PC image is seen as a second live video source to the near and far site is at an image resolution of 704 x 576 pixels. This is referred to as dual-streamed video.
Installing Visual Concert PC is easy and can be done in one of two ways: 1. Insert the Visual Concert PC card into your PC or laptops PCMCIA slot. The PC automatically loads the Visual Concert PC software. 2. Connect the ViewStation to the PC over the LAN and run the VisualConcert.exe application on the PC. Visual Concert PC works in a single-monitor or dual-monitor configuration. It can be used out of a call or in a call (H.320 or H.323) with another ViewStation with at least version 7.0 software. This allows you to make presentations to near and remote sites directly from your PC. Note You must have ViewStation software version 7.0 or better to use Visual Concert PC.

Microphone pod is too far from the speaker. No audio in a call. Television monitor audio inputs not connected properly.
ViewStation connected to the wrong audio input on the monitor.

Far site is muted.

Too many network line errors. ViewStation startup music plays through the built-in ViewStation speaker, but not through monitor speakers. Incoming call ring and other sound effects too loud or too soft. Television monitor speakers or audio amplifier not properly connected.
Sound effects volume not set at desired level.
Adjust the sound effects volume on the Phone/Audio screen. If you do not want to hear sound effects, set the volume to zero.
An echo is heard at the near site when speaking.
Far site microphone pod is too close to the audio speaker.
At the far site, make sure the microphone pod is placed away from the audio speaker. Turn down the audio volume at the far site. Turn on the VCR input by selecting the NEAR key twice and selecting the VCR icon. Connect the monitor or audio amplifier to the monitor audio out of the ViewStation.
The far site audio volume may be too loud. Near site or far site cannot hear VCR audio or see the VCR video. Local audio can be heard when speaking in the microphone. VCR input is not selected.
The monitor or audio amplifier is not connected to the audio out of the ViewStation.

The monitor is blank.

The ViewStation goes to sleep mode after four minutes of inactivity. Only one 64 Kpbs channel is connecting in your call.
Pick up the remote control to wake up the ViewStation

Picture slow or jerky.

Check the ISDN number of the far site. Ask the far site to call your site. Verify network under the Network Status menu (System Info > Diagnostics > Network Stats.)
Excessive motion in the picture you are receiving.
A background with less motion provides a better, smoother video picture. Make sure you have selected a pan/tilt/zoom camera.
Near site camera does not pan or tilt.
You are attempting to move a camera that does not have pan/tilt/zoom capabilities. No video input.
Blue screen in the PIP window.
Check that there is a video source present on the selected input. Check camera selection on the Camera screen. Select a different input on the ViewStation, or play a tape on the VCR.
Camera selection is incorrect.
The VCR input is selected and the VCR is idle or not running. Most VCRs generate a blue screen when the tape is not playing.
Camera voice tracking does not work properly.
Camera tracking was turned off by near or far site.
Camera tracking is turned off when the near or far site moves your camera. Press the AUTO button to restore tracking. The camera stops tracking when the far site speaks to prevent the camera from pointing to your monitor speaker. Wait for the far site to stop speaking.

The far site is speaking.
The far site is very noisy.
The camera stops tracking when the far site is too noisy. Try setting the ViewStation to track to camera presets. The near site camera does not track when the near site is on MUTE. Toggle mute function with the MUTE button. Reduce the noise in the room.

Near site is on mute.

Near site is noisy or too many people are talking at once.
Network and Communications
ISDN: Error Message when dialing a video call. ISDN: When placing a call, progress icons do not turn green.
ISDN error code received from the ISDN line. Call Progress icons indicate that the video call did not complete.
See ISDN Information on page 203. The Call Progress icons indicate the call state when placing or receiving a video call on each ISDN channel: 1/4 Blue - Ringing. 1/2 Yellow - Call connected and is ringing at the far site. 3/4 Orange - Negotiation. Full Green - Connected. Go to the Call Status screen. Highlight each of the circles for each of the channels dialed. The numbers dialed for each channel are displayed as you highlight the corresponding circle. Make sure that the far site has entered the number for each ISDN line correctly. See ISDN Information on page 203.
System is waiting for an IP address. System Info screen shows waiting in IP address field.
LAN or DHCP server is not operating.
Check connections to the LAN. Contact your network administrator.
ISDN line is not present. ISDN: Line Status icons do not go away so video calls cannot be made. ViewStation is directly connected to a U interface.
Check the ISDN line connections. Install an NT-1 between your ISDN line and the ViewStation ISDN connection.
ISDN Line errors when using SPID configuration
For ViewStation with BRI or DCP: Go to the Numbers screen (System Info > Admin Setup > Video Network > Numbers) and check the ISDN numbers are entered correctly. For ViewStation 128: Go to the ISDN Video Network screen (System Info > Admin Setup > Video Network) and check the ISDN numbers are entered correctly.
Enter correct SPID numbers. Note: The AT&T point-to-point protocol does not require SPIDs.
Error Message occurs when dialing a video call.
The first line did not connect. It cannot make a call if the first line does not connect. If it is an H.323 call, IP Gateway/ Gatekeeper is not operating or is not configured correctly.

Appendix B

Audio Input Levels
RCA audio input connectors 10 K ohm minimum input impedance 1.0 Vpp full scale input expected All audio inputs are AC coupled

General V.35 Information

The ViewStation is designed to be compatible with tested network equipment without any modification from the user. If your network equipment varies from conventional V.35 video implementations, you can adjust the operation of the signals. Use the following technical information with information provided by your network equipment vendor to customize your V.35 interface.
Serial Interface Control Signals
The following table describes the configuration of each signal. Signal (Cable Pin)
ST (TC/TT) RT (RC) RTS (RTS) DCD (DCD)

Direction

OUT IN OUT IN

Description

Send Timing (clock) Receive Timing (clock) Request To Send Data Carrier Detect

Configuration Option

Normal: falling edge sends data Inverted: rising edge sends data Normal: rising edge receives data Inverted: falling edge receives data Normal: high voltage is logic 1 Inverted: low voltage is logic 1 Normal: high voltage is logic 1 Inverted: low voltage is logic 1 Filter: allow DCD to drop for 60 seconds before changing call state

CTS (CTS) DTR (DTR)

IN OUT
Clear To Send Data Terminal Ready
Normal: high voltage is logic 1 Inverted: low voltage is logic 1 Normal: high voltage is logic 1 Inverted: low voltage is logic 1 On: constant high voltage Note: if set to ON, inverted is not an option.

DSR (DSR)

Data Set Ready
Normal: high voltage is logic 1 Inverted: low voltage is logic 1 Answer: Use DSR as a Ring-In indicator

Appendix C

State Machine
The V.35 State Machine describes how the V.35 interface signals handshake with the network interface equipment during call establishment.

Dial Out State Machine

ViewStation Signals
Initial State: DTR = 0 <note 3> RTS = 0 <note 2> CRQ = 0 USER INITIATES CALL DTR = 1<note 3> Wait 10 ms CRQ = 1
Network Equipment Signals
Initial State: RI = 0 DLO = 0 ACR = 0 DSR = 0
PND = 1 Set Digit (NB1,NB2,NB3,NB4) DPR = 1 PND = 0 DPR = 0 If not the last digit, go to state 4 otherwise continue Call connects on network DSR = 1 AND/OR DCD = 1 (AND/OR DSR = 1 <note 1>) RTS = 1<note 2> DATA FLOW STARTS User Hang-up DATA FLOW STARTS Far End Hang-up
RTS = 0 <note 2> DTR = 0 <note 3> CRQ = 0 All signals go low if Far End or User hang-up is detected.

V.35 Cabling Diagram and Schematic
Figure C-1. V.35 Y Cable Pinout

J1 DB25 Male 3 +/- 1

5 +/- 1
J3 V.35 Male J2 DB25 Male
Figure C-2. ViewStation V.35 Cable Diagram
If you are not connected to an internal phone system often, called a PBX, you need to connect the ISDN cables from your ViewStation IMUX module to the NT-1 device. An NT-1 device is used with the North American ISDN U interface. The lights on the IMUX indicate whether or not the ISDN lines are connected properly. The lights, however, do NOT indicate that the SPIDs, switch type, and ISDN numbers have been correctly entered into the ViewStation. The following are sample NT-1 settings. For more detailed diagnostic information, see the manual that was shipped with your particular NT-1 device.

Sample NT-1 Settings

On an ADTRAN NT-1 ACE ISDN termination unit, you should see the following status lights when your ISDN lines are properly connected. Status
Ready ON Error OFF Power ON
The dip switches should be set as follows: Switches Configuration Termination

SHORT LONG NONE 50 100

Appendix D
On a Motorola NT1D, you should see the following status lights when your ISDN lines are properly connected. Status
SC ON ACT ON LB OFF LP ON RP OFF RPR OFF
The dip switches should be set as follows: Switches

1 ON 2 ON 3 ON 4 ON

On an Alpha Telecom (AT1) UT620F, you should see the following status lights when your ISDN lines are properly connected. Status
Power ON ST&U OFF Back OFF
The dip switches should set as follows: Switches

1 ON 2 ON 3 OFF 4 ON

ISDN Switches
Depending on the type of ISDN lines you are using, your service provider may assign zero, one, or two SPIDs per line. Switch Type
AT&T 5ESS Custom AT&T 5ESS NI-1 NT DMS-100 NI-1 NI-2 Siemens EWSD NI-1 Siemens EWSD NI-2 International (outside United States or Canada)

SPIDs Allocated

None 1 per B-channel 1 per B-channel 1 per device 1 per B-channel 1 per device None

ISDN Errors

The following table describes ISDN standard cause values that indicate ISDN call status. Although the cause values are standardized, each ISDN service provider phrases the cause differently. Therefore, the causes shown in the table might not be the exact messages that appear on your television monitor. Code

Unassigned number

Definition
The switch received the sent ISDN number in the correct format; however, no destination equipment uses the number. The ISDN exchange can not recognize the intermediate network through which to route the call. The destination address is not serviced by the intermediate network through which the call is routed. The specified channel does not provide sufficient service quality to accept the requested connection. The user is assigned an incoming call that is being connected to an already-established call channel. Normal call clearing has occurred. All B channels are in use; the called system acknowledges the connection request, but is unable to accept the call.