I have a Bogen PCM2000 paging system, which I’m trying to connect to my Asterisk PBX using an analog telephone adapter (ATA). I tried PLANET VIP-158 and Grandstream HT-286, neither worked as expected. The PLANET one does not hang up in time, so there are a few seconds of busy tone after the announcement. The Grandstream one disconnects 1 second after connection, regardless of what I do.
I know the Bogen system expects a CPC pulse at hangup, so as to know when to hang up as well. I assume the problem is the CPC Pulse is not sent correctly by these ATA devices, (or not sent at all, or sent when unneeded).
Is there any ATA device that is known to handle CPC correctly in this situation? or maybe a configuration change in one of my existing ATAs could make it work? Any help is appreciated.