The client of mine insisted on using Panasonic Cordless phones with the digital voicemail features. So I’m hooking the phones to GrandStream Handtone 286s. I’m running Asterisk on a Debian box and can call out and receive calls through Teliax just fine. However, when an incoming caller (after leaving a message) hangs up, the answering machine seems to keep the line alive with a very loud busy signal. It does this 3 times, then hangs up. The messages also record this sound, and it is very annoying.
Any ideas on how stop this? I was looking around and thinking that Asterisk is not detecting the hangup?