Introduction
Welcome to the TELES ISDN family! You are now the owner of a TELES.FON. The whole family can enjoy the benefits of ISDN telephony. Telecommunications in the office is also more comfortable. The phone is ringing and you wonder who it could be for? Now three members of the family can have their own telephone number with their own special ring tone. The party you are trying to reach is frequently busy. The Callback when busy function automatically establishes a connection for you as soon as the line is free again. Is the baby really sound asleep? A discrete call to the telephone set on Room monitoring in the childs room gives you peace of mind. Your child lifts the receiver and Grandma is on the other end of the line automatically? Thanks to Direct call. Transfer of calls are possible only through a private branch exchange? TELES.FON makes Comfortable call transfer to other TELES devices on the ISDN line possible. You would rather have your PC handle and log your calls? As a member of the TELES.ISDN family the TELES.FON can hook up to your computer through an ISDN adapter. The integrated software adds even more comfort to ISDN telephony. How about a charges counter for all devices on the ISDN line? The TELES.FON is counting right along. These are just a few of the special features that the TELES.FON offers. Read the detailed descriptions on the following pages on how to get the most out of your TELES.FON and ISDN telephony.
The Telephone at a Glance

Signal Tones

OK tone Error tone
A long beeeep. Your entry was successful and is being confirmed. A short beep. You have attempted to use a blocked or impossible function. Two short beeps. You have attempted to activate a function that does not work in this state. Two beeps. While you are speaking on the phone or making settings someone is trying to reach you.
Impossible tone Call waiting

The Function Keys

Display F key

M4 M5 M6

Speed-dial keys Dial keys Subtitles: Function of the key after pressing the F key
C a llb a ck w h en b usy

P a rk

C o nfe re nce

C a lle rs list

C h arg es

Tra ce

C a ll C ou nter
C a ll w aitin g D o no t distu rb D irect ca ll

D iscon ne ct

Functions of the special keys (without the F-key) Advice of Charges Comfortable Call Transfer Program Redial Mute Loudspeaker

The Display

Symbol Function
Telephone is in the Programming mode. Dialing is not possible. Switched to Function mode; second key case is valid.
Partial block is activated. Global block is activated or call charges account is depleted. Loudspeaker is on. Do not disturb No calls are accepted.
new i Blinking - 6.0. message
from OPP machine Answering6.0 is record- from OPP ing. (Only with TELES.OnlinePowerPack)
Direct call is activated. Advice of Charges is activated; call charges are displayed. is activated.
Mute Receiver is deactivated Callback when busy is activated.

Room monitoring

Standard Displays
Display with receiver down. The first MSN is not confirmed. MSN 2-3 confirmed or not set. Followed by date and time. Display during dialing The number being dialed is shown in the display. Display during an active connection Connection time and advice of charges1 are displayed. Display when the telephone rings: If the caller has Caller ID then that number is shown/Otherwise an n Caller with Caller ID on a programmed MSN: MSN and call number are displayed. Caller with suppressed Caller ID or analog phone on a programmed MSN: MSN and n are displayed Display following termination of the connection. Display during partial or global block Either or respectively.
D ate and tim e ap pear after the first e stablished connection
C harge s of the connection
1. The feature advice of charges needs to be arranged for with your telephone company.
Function Turn on/off Call Forwarding
Key Combination <MSN 1,2 or 3> <type of call forwarding 1, 2 or 3>

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Set Call Forwarding target call no. <MSN1,2 or 3> <or> and type of call forwarding =next,=previous type Activate/deactivate Call Waiting or Accept Call Waiting or Answering Machine call Turn on/off Direct Call Enable Charge Account Disable Charge Account Display Charge Account <call charges>

1998 by TELES AG Berlin, Version 1.1/fon-eu/13.07.

Page i

Programming. Time and date. Volume of the loudspeaker and receiver. Device ID. PIN (Personal Identification Number). Display contrast. Do not disturb. Speed-dial numbers. Ring melody and volume. Multiple Subscriber Number (MSN). Call waiting. Room monitoring. Caller ID. Charge account. Charges factor. Call charges and connections counter. Resetting call charges of all devices on the ISDN line. Number of digits for the park ID. General explanation of call numbers blocking. Blocks. Call numbers for the partial and global block. Direct call. Call forwarding. Destination call numbers for call forwarding. Call forwarding. 44
PC-Integrated Telephony. 45 TELES.OnlinePowerPack (not included with the TELES.FON). 45 Technical Data/General Notes. 46 Technical data. 46 Licensing. 46 Solving Minor Problems on your Own. 47 Faults and troubleshooting. 47 Hotline and Service. 49 Appendix. 50 User Contract. 50

Page ii

Setup and Installation

General

ISDN independent features Hands-free operation, On-hook dialing, Loudspeaker operation Loudspeaker volume adjustment, Adjustable ring melody and volume Phone silent (Do not disturb), Muting Date / time display, Call timer Direct call Partial and Global block Room monitor with extended loudspeaker function Call charge and total charges, Total charges all devices on ISDN line Charge account, Resetting total call charges Call counting Secure programming with 5-digit PIN code Memory for 6 speed-dial numbers Suffix dialing Redial with history function (5-number memory) Caller list with up to 10 numbers, Callback when busy DTMF-dialing ISDN dependent features: Euro-ISDN protocol DSSMultiple Subscriber Numbers (MSN) Caller ID presentation (CLIP), Caller ID suppression (CLIR) Call waiting Three-party conference Call forwarding unconditionally Call forwarding no reply (conditional if call is unanswered) Call forwarding on busy (conditional if line is engaged) Parking / Comfortable call transfer Hold for enquiry, Hold and alternate Trace calls (Malicious Call Identification)

Limitations

Due to technical differences in ISDN lines of various countries not all features of your TELES.FON may be available.
1998 by TELES AG Berlin, Version 1.1/fon-eu/15.07. Page 1

List of contents

1 Telephone 1 Telephone receiver 1 Telephone cable 1 Receiver cable 1 Users manual

The display will only appear if there are two or more TELES.FONs on the same ISDN interface. If telephones from other manufacturers are also attached that are also set to emergency power this error will not be identified by the TELES.FON. In order to program the telephone under emergency power, take the following steps:
Lift the receiver. Put the receiver down again. Program your TELES.FON.
Please note the following limitations of functions under emergency power: the volume of the ring is subdued on-hook dialing and hands-free operation are not possible
Page by TELES AG Berlin, Version 1.1/fon-eu/15.07.
Basic Telephony Functions
General notes on operation and programming
During on-hook dialing the last entered digit can be deleted by pressing the R key. Programming is generally done on-hook, i.e. you leave the receiver down while you press the keys for programming. If you want to interrupt the programming or an activated function (e.g. advice of charges, callers list) simply press the -key again. Should there be no entry for a longer time (20s - 2min) the telephone returns automatically to the basic state. During programming the - or -keys can be used to switch between different dial modes Programming can be simplified when you use the speed-dial keys for entering call numbers. During programming the telephone cannot answer calls. Activated functions (e.g. advice of charges, callers list) are not displayed during an incoming call. All functions that are activated with receiver down can be interrupted directly with the -key.

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Dial pad dialing
Lift the receiver or press the loudspeaker key. Enter call numbers.
Enter call numbers. ! Lift the receiver or press the loudspeaker
Sending different Caller ID/MSN
You can determine which of your MSNs should by sent as caller ID to the called party. By default the first one is sent. You can send the 2nd or 3rd MSN instead. This is practical for charging calls to different numbers and for determining which number should appear on the called partys telephone display.

Press and hold

or for MSN 2-3
Lift the receiver and then release key. Dial the call number.

Redial key dialing

or: Lift the receiver or press the loudspeaker key. Press the redial key (the number last dialed is called).

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Callers list with connection display, date and time
The callers list shows in order up to 10 call numbers of the last callers. In case no connection was established this is indicated by a - before the telephone number. Date and time of the call can also be displayed.
Press the -key. Press the redial key, if necessary several times. You see the call number of the caller. Press the mute key to the display the date and the time. Press the mute key again in order to return to the call numbers display.
Note: Identical call numbers are stored only once in the callers list. This means that the order of the call numbers in the callers list does not necessarily reflect the order of incoming calls. You can delete the stored numbers in the redial or callers list by pressing the -key when the number is displayed. Control signals (DTMF)
Dual Tone Multi Frequency (DTMF) signals can be send during an existing telephone connection by pressing the - , and keys. These signals permit you for instance to control answering machines, voice boxes, special services of switchboards, etc. Read about the necessary control signals, i.e. keys, in the devices user manuals or listen for them in the menus of the service number.

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Telephoning - Special Functions
Parking and recommencing a conversation
You would like to interrupt a conversation briefly while upholding the connection. This can be necessary for example when you want to continue the conversation on another telephone on the same ISDN line. Park conversation:
Press the -key and the number 1.

" #

Enter the park IDentification number (see 87.multiple digit park ID) Put the receiver down once youve heard the OK tone. The connection is parked.
Note: Should a 3- to 8-digit park ID have be set by $. , then the entry must always be concluded with the-key. This is not necessary for 1- or 2-digit park IDs.
Recommencing the conversation on another telephone:
Press the -key and the number 1. Enter the park ID that was entered when the call was parked. Following the internal call ring: Lift the receiver or press the loudspeaker key.
Note: If there already is an active and an on-hold connection on your telephone the park function wont work. A call can be parked for up to 3 minutes. After that the switchboard terminates the connection automatically.
1998 by TELES AG Berlin, Version 1.1/fon-eu/15.07. Page 13
Comfortable call transfer
Your TELES.FON features a unique function to transfer calls to a further TELES.FON on the same ISDN interface. Both devices need to have different device IDs (to be set by the programming command 92.). This is similar to the parking and recommencing of a call as described above. Whereas the above method allows the call to be continued from any device on the ISDN line, this method transfers the call to one specific device. You are conducting a conversation:

Press the -key. Press the number 0.
If the waiting caller hangs up or you press you are once again connected only to the first party.
Note: Should you hang up the receiver when you hear the call-waiting tone then your phone rings. Once you lift the receiver or press the -key you are connected to the waiting caller. Note: If both B channels are busy then call waiting is only possible if this is supported by the ISDN switchboard.

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Three-party conference
You would like to conduct a conversation with two call parties simultaneously. You have established the connections with holding-for-enquiry or call-waiting calls. Establish a conference:
Press the -key. Press the number 3. All three parties can converse with each other now.
Ending three-party conference:
Press the -key and then the number 3. You are back to the hold-and-alternate mode. Note: With a renewed pressing of + you return to the conference

status.

Put the receiver down. Both connections are terminated. The three-party conference is also ended when one of the other parties hangs up. The conversation can then be continued with the remaining party.
Ending the conversation with one party: (after ending the three-party conference as above)
Press the -key and then the number 0. The active connection is disconnected and the conversation can then be continued with the remaining party

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Room monitoring (babysitting)
Room monitoring permits you to listen in into the surroundings of the telephone from a remote telephone. Program at least one MSN. If you have several MSNs programmed then room monitoring functions only with the MSN 3. Activate the room monitoring function by entering 72, your PIN and 1 (see page 33). During any incoming call the TELES.FON does not ring. The caller will just hear the sounds in the room where the phone is placed. If the connection lasts longer than 30 seconds the loudspeaker is also switched on. The caller is informed by a beep signal at his end. He now has the possibility to speak into the room. This is an extended feature of room monitoring. Should on the other hand no noise or voices be transmitted from the calling phone to the phone with room monitoring it is advisable to mute the phone (e.g. press the -key). When the caller hangs up finally a short beep can be heard at the phone with room monitoring. Calling to a phone with room monitoring:
Lift the receiver. Dial the telephone number of the phone for which the room monitoring function has been set.

Display on the TELES.FON with room monitoring: During the first 30 sec.
After 30 sec. Loudspeaker is switched on

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Information on the last connection
During or following a conversation you can have the call number and the duration of the connection along with charges displayed.

Press the -key.

Press the number 2. The call number is displayed. Press number 2 again. The connections duration and the call charges are displayed.
Press the -key to end the display.

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Connections counter
You can have the number of successfully established connections consecutively displayed for MSN 1 through MSN 3.
Press the number 6, if necessary several times. Displayed from left to right: The MSN (1-3), the number of incoming and the number of connections established by you. Press the -key again to end the display.
Charge account advice of charges
In case you would like to have the current state of a set charge account displayed take the following steps:
Press the number 4. The charge units of the charge accounts are displayed. Press the -key again to end the display.
Note: By entering you can delete the charge account.

Cumulative charges

In case call charges were made during a conversation they will remain displayed for 6 seconds following the call. Besides that all the charges made on your telephone since the last deletion can be displayed.
Press the -key. the charges of your telephones are displayed. Press again to display the total charges on the ISDN line. Press the -key to end the display
Note: By entering . you can program the charges display to show either charge units or currency units. By entering . you delete the charges counter. The display of the total charges on the ISDN line can result in slight deviations to the phone bill following the use of the park function. Tracing calls (Malicious Call Identification)
During or following a call you can have the call traced. Prerequisite is a legal application with the phone company. You conduct a conversation or the other party has ended the conversation and you hear the busy signal.
Press the -key and then the number 5. You hear the OK tone.

"

Note: The key combination sends a command to identify the caller to the appropriate switchboard.
TELES.FON and the TELES.OnlinePowerPack answering machine
Following the installation of TELES.OnlinePowerPack* (as of version 6.0) on your PC you posses a pick-up function for your telephone. The TELES.FON can take over a call from answering machine. The coordination with your TELES.FON is done in the following manner: A call comes in that can be answered by the answering machine of the TELES.OnlinePowerPack as well as by the TELES.FON. The answering machine symbol blinks as the telephone rings:
! Lift the receiver. takes over the The TELES.FON ) call. symbol disappears. The

or: The answering machine has already accepted the call. The answering machine symbol remains on as long as the answering machine records the conversation.
Press + and the number 7. The TELES.FON rings. Lift the receiver. The symbol disappears. You conduct the conversation with the caller.
or: The recording of the call has ended. The symbol has disappeared. * see TELES.OnlinePowerPack, page 45.

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TELES.FON and Information display from OnlinePowerPack

The i-symbol blinks:

Press the -key and the number 2, if necessary several times. You can view information on the number of incoming calls, faxes and e-mails. 7 calls
(Anr = Abbreviation for Anrufe which stands for calls in German)

4 faxes

1 e-mail
* see TELES.OnlinePowerPack, page 45.

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Programming
Resetting to delivery state
In the delivery state the TELES.FON features the following factory settings: all charges and connections counters deleted charges factor on the display set to currency units all MSN and call numbers deleted direct call, partial and global block off no call forwarding set PIN: 00000 device ID: 01 caller ID transmission permitted call acceptance on loudspeaker volume set to medium ring volume maximum
Note: Activated call forwardings should be deactivated before a reset, because MSN and destination call numbers are deleted.
Rest the TELES.FON to factory settings:

Press the 0 twice.

Enter the PIN, as long as it is not 00000. Press the -key again. The TELES.FON is reset to the factory settings.

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Time and date
Time and date are automatically updated by the ISDN net and do not need to be set manually. Following the installation, after resetting into the delivery state and or a power failure there is no display. Once an active connection into the public net is made date and time are brought up to date on the display.
Volume of the loudspeaker and receiver
The volume should be adjusted during a conversation; You can also orient yourself according to the dial tone.

Lift the receiver or press the loudspeaker key
Press the -key. Press the -key, if necessary several times, to increase the volume or press the-key, if necessary several times, to reduce the volume. Press the -key again. Continue your conversation or put the receiver down.
Note: The set volume remains valid for future connections.

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Device ID
The device ID is only needed if you operate several devices with the TELES.Family patent control on one common ISDN line or if the comfortable call transfer is used. In the delivery state the device ID is set to 01.

Press numbers 9 and 2.

Enter the PIN. This is only necessary if the PIN is not 00000. Enter number 1.8.

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PIN (Personal Identification Number)
Required entry of a PIN for certain commands protects your telephone from being used by unauthorized persons. You prohibit for example that charge accounts or blocks are manipulated by those not permitted to do so. The PIN is always a 5 digit number. Be sure to remember your PIN well; a forgotten PIN has about the same effect as losing a key. Should you ever forget this code, the phone has to be sent to the manufacturer to be serviced at your cost. At delivery the PIN is set to the factory setting of 00000.

Press numbers 0 and 1.

Enter the PIN. At delivery the PIN is still set at 00000. Enter the new 5-digit PIN.
Repeat the entry of the new PIN. Press the -key.
Note: If you would like to do without a PIN, simply leave or set the PIN at 00000. The PIN will not be requested any more then.

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Display contrast
The contrast of the display can be adjusted to the light of the surroundings.
Press the -key. Enter the digits 7 and 0. Press the -key, if necessary several times, to increase the contrast. Press the -key, if necessary several times, to reduce the contrast. Press the -key again.

Do not disturb

When the do not disturb function is activated no calls are accepted. The caller hears the busy tone or an announcement that the extension is temporarily not reachable. The call number of a caller is recorded though in the callers list if it comes from another ISDN extension.

Press number 8.

With a renewed pressing of $ you switch back to call acceptance.

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Speed-dial numbers
You can store frequently used call numbers. The TELES.FON features 3 speed-dial keys. In combination with the F key these speed-dial keys can store up to 6 call numbers.

&

Press the -key. Press one of the speed-dial keys for memory M1-M3; For memory M4 - M6 press the -key first. Enter the call number (if necessary with a prefix) Press the %-key to make any corrections, e.g. deleting a previous number. Press the -key. The call number is now stored.
Note: When activating the direct call function the call number stored in M1 is used.

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Ring melody and volume
The melody and volume of the ring can be set individually for each MSN. The volume can also be programmed as an increasing tone.

Press number 2.

Press: for MSN 1 for MSN 2 for MSN 3 Press: softer tones louder tones slower ring quicker ring increasing tone off increasing tone on reduction and increase of the start volume for the increasing tone. Press -key.
In this example a volume increase of the ring tone is set from the value 02 to 09. The ring frequency is 12.
Note: The maximum value for increasing ring tones is identical to the standard tone set by the - or -keys.

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Multiple Subscriber Number (MSN)
You can assign up to 3 MSNs for your telephone, i.e. it rings only if one of the programmed MSNs was dialed. You can set an individual ring melody and volume for each call number. In this way you can differentiate incoming calls acoustically by the sound (see previous page: Ring melody and volume) as well as by the display.

Press number 1.

Press for MSN 1 for MSN 2 for MSN 3 Enter the 5-digit PIN. This is only necessary if the PIN is not 00000. Enter the MSN call number.
Note: The MSNs are supplied to you by you telephone company. Enter them without country or area codes. For outgoing calls the first Multiple Subscriber Number of the telephone is used for the identification of the connection, such as charge account, display of the call number at the called party etc. Otherwise you can also define the MSN to be sent (see Basic Functions - Dialing with the dialing pad.)

Note: The numbers 1, 11, 110 and 112 cannot be blocked. Call numbers from the speed-dial memory can be entered directly by simply pressing the memory keys. For M4 - M6 press the key twice instead of using the F key.

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Direct call
When direct call is activated the call number stored in the speed-dial memory 1 is dialed immediately when the receiver is lifted. The direct-call function is switched on and off with 9.
Press the -key and 9. Repeat to switch it off again
Note: When the direct-call function is activated programming of the TELES.FON is not possible. No key functions besides 9 can be activated. Direct call can not be activated if: - the charge account is active - the partial or global block is set - no call number is stored in speed-dial memory 1.

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Call forwarding
For each of the Multiple Subscriber Numbers (MSN) that you have programmed with the basic settings as call numbers on your telephone (up to 3 call numbers), you can if necessary have calls forwarded to another call number; as well as to another Multiple Subscriber Number on your ISDN access. Three types of call forwarding with an appropriate destination call number can be programmed for each MSN. Call forwarding 1 is the unconditional or immediate transfer. Call forwarding 2 is transfer when there is no reply within a certain time, e.g. your telephone rings for approx. 15 seconds before the call is transferred. Call forwarding 3 is transfer when busy. The various types of call forwarding are identifiable as segments in the display as following:

no reply when busy

unknown unconditional
The types of call forwardings displayed are set individually for each MSN.

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Destination call numbers for call forwarding
Destination call numbers for the three different types of call forwarding for each Multiple Subscriber Number (MSN) can be set. Per MSN three destination call numbers can be programmed.

Enter number 6.

Enter: for MSN 1 for MSN 2 for MSN 3 Enter: for the next

for the previous type

of call forwarding
Enter the destination call number. Press the -key. In the example, call forwarding immediately has been set for the first MSN.

Note: For each MSN only one call number can be assigned per type of call forwarding. The call numbers stored in the speed-dial keys memory can also be entered by pressing the speed-dial keys. To get the numbers stored under M4 - M6 press the speed-dial key twice since the -key terminates programming!

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The call forwardings set by 6 have to be activated or deactivated.

Enter number 5.

Enter: for MSN 1 for MSN 2 for MSN 3 Enter: Call forwarding 1 on/off Call forwarding 2 on/off Call forwarding 3 on/off Renewed entering of the number deactivates the function. Press the -key. (Saving can take several seconds!)
call forwarding unconditional
Note: Call forwarding cant be turned on or off if - not at least one MSN is entered - the entered MSN is not correct - no destination call number for the call forwarding has been entered. Several call forwarding types can be activated at the same time, e.g. call forwarding when busy and if no reply.

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PC-Integrated Telephony
TELES.OnlinePowerPack (not included with the TELES.FON)
ISDN offers new possibilities for the integration of telephone and computer. PC-integrated telephony is also quite easy with your TELES.FON. All you need for that is an ISDN board for your PC - for example a TELES.BRI board that also comes with the appropriate software. Of course you have to be sure that this board is attached to the same ISDN line as your TELES.FON. Make full use of all the benefits available through ISDN by running the All-in-one ISDN/Multimedia software suite TELES.OnlinePowerPack that is delivered free with TELES ISDN boards or purchasable separately: The program MCC handles the dialing of the called parties for you. The integrated answering machine records incoming calls and lets you listen in or return the call right out of the callers list. The display of your TELES.FON shows the recording of messages by the answering machine. The ISDN device manager of the TELES.OnlinePowerPack also simplifies programming of functions of the TELES.FON: Almost all functions can be easily programmed and activated on your PCs screen. Additionally the ISDN device manager offers extensive statistics on the calls conducted. This is all made possible by a concept developed by TELES - the TELES.Family concept. It unifies the TELES terminal devices to a complete PC-integrated communications solution for the office and the home.

Call forwarding is set. Room monitoring is set. Call forwarding can not be programmed. MSN not programmed or wrong. Destination call number not programmed. Switchboard does not support call forwarding
Enter destination call number. Apply for call forwarding at the telephone company.
A telephone reset can help sometimes when problem do not seem to go away. Disconnect the telephone line briefly or press the -key and the numbers 93. After a few seconds the display is refreshed.

Hotline and Service

The TELES Hotline is available Monday to Friday from 8.30 a.m. to 6 p.m.
TELES AG Dovestrae 2-Berlin GERMANY TELES France SARL Continental Square 4 Place de Londres F-95727 Roissy FRANCE TELES Italia SRL Via die Platani 6 I-20020 Arese (MI) ITALY TELES Benelux BV De Lasso 70 NL-2371 GZ Roelofarendsveen THE NETHERLANDS Phone:+49 (30) 033 Fax:+49 (30) 01 Support Server:+007 World Wide Web: http://www.teles.de Phone:+33 (1) Fax:+33 (1) Support Server:02
Phone:+39 (2) Fax:+39 (2) Support Server:777 International Sales: +31 (71) Local Support:+31 (71) Fax:+31 (71) Support Server:+31 (71) World Wide Web:http://www.teles.nl
Round-the-clock service is available from your national TELES Support Server (see number listed above), allowing you to download updates, product information, tips and manuals. To access the support server you will need a TELES.ISDN adapter and TELES.OnlinePowerPack software. The SUPPORT Server cannot be accessed on Friday from 8:30 a.m. to 9:30 a.m. due to maintenance. Return Material Authorization (RMA) Resent goods are accepted only if a RMA (=Return Material Authorization) number is attached to these. TELES assigns such a number on (written) request after evaluation of the validity of the return. Goods must be packed appropriately. Cost compensation option for hardware checking TELES may ask for compensation of hardware checks, if e.g. a hardware check has been ordered but no error could be found. In this case, TELES may bill for the costs (labour etc.) that occur while checking the hardware.
1998 by TELES AG Berlin, Version 1.1/fon-eu/15.07. Page 49

Appendix

User Contract
The TELES.FON contains computer programs that are protected by copyright law. Illegal use of these programs may result in civil and criminal penalties. The accompanying user manual and the hardware supplied with the program are also protected by copyright law. As sole owner of these products, TELES reserves all proprietary rights of use. Warranty / Liability 1. The Seller gives the Buyer the guarantee to remedy a defect of the TELES.FON within 6 years after delivery or, if this is impossible, make a substitution free of charge. This warranty is terminated if the Buyer or any third party has modified or attempted to repair the hardware or software. The liability of the Seller does not cover damages due to natural wear and tear, improper handling or operating errors. 2. The Buyer shall inform the Seller in writing within 14 days of acquisition about apparent defects and return the faulty merchandise to the Seller. 3. Software defects can be repaired only if they can be reproduced. The Seller shall remedy only such software defects that substantially affect the promised use. 4. If the repairs or substitutions mentioned above in section 1 are not carried out or are impossible, the Buyer is entitled, at his option, to rescission or abatement. 5. The foregoing paragraphs are the sole and exclusive provisions regarding the warranty. They do not preclude, however, quality guarantees that protect the Buyer against risk of consequential damages. 6. In no event shall the Seller be liable for consequential damages unless resulting from malicious faults or negligence. The Seller shall not be liable for damages caused by vicarious agents. The Seller is only responsible for damages covered by the manufacturer's liability insurance. Product liability claims regulated by the pertinent national product liability laws remain unaffected by these terms. 7. Legal venue for all obligations and liabilities arising out of this agreement shall be the head office of the Seller.