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