Operator's Manual
B-31
Tr
oubl
eshooti
n
g
Query from external calls doesn't work
Possible Cause
���
Extension does not have outgoing access
���
Telephone's Flash key is not set correctly
Remedy
���
Grant outgoing access from the program-
ming telephone/PC
���
Check the Flash key (refer to the tele-
phone's operating instructions) and if neces-
sary set the correct Flash time in the PBX or
carry out automatic Flash time detection
Pick-up doesn't work
Possible Cause
���
The subscriber who wants to carry out exter-
nal pick-up doesn't have appropriate outgo-
ing access.
���
All the B channels on the internal S
0
port are
assigned (ISDN telephone)
Remedy
���
Grant outgoing access from the program-
ming telephone/PC
���
The other conversation must be completed
first.
Special tone instead of the dial tone
Possible Cause
���
Call forwarding, call protection, immediate
connection without dialling or an information
tone (call data memory more than 80% full)
is activated
Remedy
���
If necessary, deactivate the corresponding
function. Important: with immediate connec-
tion without dialling, you must do this within
the first two seconds
Crackling on the line shortly after lifting
the handset or interruptions in the dial
tone
Possible Cause
���
Charge transfer at the start of the next call is
activated
���
The handset cord is faulty
Remedy
���
If necessary, deactivate the corresponding
function.
���
Replace the cord
It is not possible to program the system
Possible Cause
���
The programming switch is in the Program-
ming blocked (“Programmieren gesperrt
”
)
position
Remedy
���
Switch over to Programming allowed (“Pro-
grammieren erlaubt”)
Making calls on the internal S
0
port
doesn't work
Possible Cause
���
Wiring fault on the internal S
0
bus
���
You didn't assign MSNs (41-48) to ISDN tele-
phones
���
The S
0
module is plugged into the wrong
slot (ETS-4308 I)
Remedy
���
Eliminate the wiring fault
���
Set up one MSN (41-48) each for the ISDN
telephones (refer to your telephone's oper-
ating instructions)
���
Plug the S
0
module into another slot
A conversation is terminated when you
press the Flash key
Possible Cause
���
The telephone's Flash time is too long
Remedy
���
Set the correct Flash time in the PBX or
carry out automatic Flash time detection