search for: unrelaible

...ard Extension causes the Zap channel to not return answerbackto the calling party until the user presses a '#' key to confirm answer. This is essential because in an analogue-to-analogue call the only confirmation of answer is tones. I don't want to use tone detection as it is too unrelaible and the UK progress tones don't work well with callpogress detection anyway. In my std-extension macro I include the Dial options r, to allow the calling party to hear PSTN ringback until the channel is answered, wither by the called party pressing # or the call going to voicemail. exten...