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Siemens 70isdn User Manual

Page 17

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Important information for installation and operation

5

kap02.fm5

Profiset 70isdn, GB: A30853-X300-B501-3-7619

20.5.99

Procedure in the case of malfunctions

The cause of an operating error need not necessarily lie

with the device. You may save time and money by rectify-

ing simple faults yourself. The following information

should be of help.

Spain

900181540

Taiwan

27512152

Thailand

29383610

United Kingd.

990334411

Siemens Service should only be contacted if

problems develop with the device.
Your specialist dealer will be happy to answer

any questions concerning unit operation.
Contact your network operator for questions

concerning telephone connection.

Symptom

Cause

Action

No display.

No power supply.

Check that the telephone connect-

ing cord has been inserted correct-

ly in the device and the NTBA.

Check the NTBA plug-in connec-

tion with the power network.

No dial tone.

No power supply.

Check the plug-in connections of

the telephone connecting cord on

the device, the ISDN socket, and

the NTBA.

Handset cord not connected

correctly.

Check the plug-in connections of

the handset cord on the device and

on the handset.

No ringing tone.

Loudspeaker volume off.

Set the loudspeaker volume,

page 20.

With PBX operation:

No or incorrect connection

after dialing from memory.

Trunk code not set.

Program the trunk code,

page 18.

The password entered is re-

jected.

Password entered incorrect-

ly.

Try again.

If you have forgotten your pass-

word, contact Siemens Service,

page 4.