Talkswitch 48-CA/CVA, 24-CA manual Line CPC/Disconnect Clear, Ringback Control, Fax Detection

Figure 111: Troubleshooting advanced

Line CPC/Disconnect Clear

If calls are accidentally disconnected in mid conversation, it usually indicates a problem with the telephone line. TalkSwitch is always looking for a hang-up signal, called a CPC or Disconnect Clear signal, from the phone company. If the line has power fluctuations or if the line card at the central office is defective, CPC signals in the 250 ms range might come down the line and cause TalkSwitch to hang up. Try increasing this value to correct the problem.

Ringback Control

If an extension seems to ring back as if a caller was on hold, but when answered, no one is there, it could indicate a debounce problem with the phone hook switch. When someone at the extension hangs up, the handset bounces slightly to cause a flash signal that can be seen by TalkSwitch before the hang-up. As a result, TalkSwitch puts the line on hold. To help with this problem, increase this value until it stops ringing back.

Fax Detection

If fax calls are not directed to the fax machine, you may need to set this option to Detect 1 tone. If it is set to Detect 1 tone and people complain they have accidentally been routed to the fax machine, set this value to Detect 2 tones.

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