Siemens A30853 - Manual (Page 53)

Important information for installation and operation
45
kap01.fm5 27.11.98 Profiset 30isdn engl.: A30853-X300-B107-1-7619
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
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 29.
With PBX operation: No or
incorrect connection after
dialling from memory.
Trunk code not set. Program the trunk code,
➔
page 31.
The password entered is
rejected.
Password entered
incorrectly.
Try again. If you have forgotten
your password, contact Siemens
Service, ➔ page 44.