Technical data

Appendix
50
Troubleshooting
The following table will help you to resolve problems or malfunctions with your Retell 340.
Problem Possible cause Solution / recommendation
No display. AC adapter not plugged in.
Check all cables and connections. Check the
telephone at another power outlet.
Display is weak or too dark Display contrast setting changed Adjust the display contrast
No tone Volume set to “0” Adjust the volume
OGM symbol blinks No OGM recorded Record an OGM
No answering of calls, no 2-way conversation
recording.
Connecting cable has no contact. Check all cables and connections.
No answering of calls if operated with a
telephone system
No ringing signal set.
Check the telephone system's programming
parameters
Humming sounds or other interferences during
playback.
Interference source nearby the device, e. g.
through a cordless telephone, monitor or similar.
Install in a different place.
No incoming message recording
You have selected an OGM without incoming
recording (announcement only).
Select another OGM or record new OGM.
No answering of calls, no function of a post-
connected telephone.
Wrong connecting cable, wrong wiring for the
junction box.
Only use original cables, check junction boxes
(possibly ask an expert for support)
Wrong or no connection when operated with a
telephone system.
You have not entered the exchange
identification code, the telephone system does
not support tone dialling.
Enter exchange identification code, change
dialling method.