Equipment: SPA9000, SPA400, 3 x SPA941, Phone Provider is Shaw Cable, with a telephony modem that has three PSTN lines.
I am currently experiencing an interesting problem. If I set the SPA9000 system AA to take all calls, this works as expected, outside callers can reach AA and dial extensions perfectly.
If I configure system with a simultaneous Hunt Group (using the wizard), so that an incoming call rings all extensions, upon attempting to pickup call from any phone, internal user will hear a dialtone and the call is not connected. Upon hanging up, system will ring again, and upon picking up the second time, it will connect the call.
All the time the outside caller only hears normal ringing, as if the call had never been connected, until the successful connection on the second attempt.
On other occasions, the internal user will attempt pick up, and hear flapping sound, as if the ring was still happening - then get a dialtone.
On other occasions (more seldomly) the call will connect just fine.
I spent 3 hours on the phone with Cisco support, we even reset both SPA9000/SPA400 to factory defaults, but experienced the same result after reconfiguring.
Any ideas? Potential problem with the phone lines? If so, why would the AA config work when AA takes the calls instead of the Hunt Group?
Would appreciate any feedback.