Important information for installation and operation

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.

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 connection

 

 

with the power network.

 

 

Check the restricted powering

 

 

switch, page 4.

 

 

 

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

Check the plug-in connections of

 

correctly.

the handset cord on the device and

 

 

on the handset.

 

 

 

No ringing tone.

Loudspeaker volume off.

Set the loudspeaker volume,

 

 

page 29.

 

 

 

With PBX operation: No or

Trunk code not set.

Program the trunk code,

incorrect connection after

 

page 31.

dialling from memory.

 

 

 

 

 

The password entered is

Password entered

Try again. If you have forgotten

rejected.

incorrectly.

your password, contact Siemens

 

 

Service, page 44.

 

 

 

45

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Image 53
Siemens 30ISDN operating instructions Symptom Cause Action