What to do if Panasonic PBX SLT set to 'tone' dialling mode cannot make calls?
- BBruce TaylorNov 22, 2025
If an SLT set to 'tone' dialling mode cannot make calls on your Panasonic PBX, there might be an issue with the DTMF receiver. First, enable DTMF receiver 1 and disable DTMF receiver 2 through system programming, using 'DTMF Receiver Check [107]'. Try making a call using a tone-type SLT connected to extension jacks 01–08. If the call fails, the problem may be with DTMF receiver 1. If the call is successful, proceed to step 4. Next, test DTMF receiver 2 by disabling DTMF receiver 1 and enabling DTMF receiver 2 through system programming, again using 'DTMF Receiver Check [107]', and attempt another call. If the call fails, the problem may be with DTMF receiver 2. If the call goes through, proceed to step 5. Check the remaining four DTMF receivers in the same manner using 'DTMF Receiver Check...















