Siemens 70isdn - Manual (Page 17)

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.