davea
New Member
- Joined
- Jan 21, 2010
- Messages
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Hi all. Just wanted to share a solution I came up with about a problem I had while interfacing a PIAF with an old legacy PBX (Promelit) through a Patton 4FXO (4114).
Problem was that while calls worked fine, lines on patton remained busy forever after hanging up on phones. Problem was a non-standard busy tone played by the legacy PBX that Patton didn't recognize as an actual busy tone. After recording that tone I opened obtained waveform with an audio editing software (audacity) and was able to measure with a milliseconds ruler the length of tones and pauses and also the correct pitch.
Once I had the correct parameters I changed the toneset used in Patton configuration accordingly.
In this case, with a Promelit PBX I had 220 (play) 185 (pause) and 425 (pitch). After that the Patton was able to understand when to hangup and FXO are free again once a call is over.
Hope this will help people with a similar problem.
Bye!
Dave
Problem was that while calls worked fine, lines on patton remained busy forever after hanging up on phones. Problem was a non-standard busy tone played by the legacy PBX that Patton didn't recognize as an actual busy tone. After recording that tone I opened obtained waveform with an audio editing software (audacity) and was able to measure with a milliseconds ruler the length of tones and pauses and also the correct pitch.
Once I had the correct parameters I changed the toneset used in Patton configuration accordingly.
In this case, with a Promelit PBX I had 220 (play) 185 (pause) and 425 (pitch). After that the Patton was able to understand when to hangup and FXO are free again once a call is over.
Hope this will help people with a similar problem.
Bye!
Dave
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