[cisco-voip] Phantom calls on Linksys SPA-8000 and SPA-3102

[Joseph Mays]

We've been getting reports we've been trying to troubleshoot from a client 
that has a Linksys SPA-8000 ATA. We were finally able to set up a Linksys 
SPA-3102 in-house and pretty much replicate the problem.

The party calling into the ATA (SPA-8000 and SPA-3102) from outside gets a 
different ring pattern (shorter ring and shorter interval between rings). 
After the ringing stops when the answering party (on a phone plugged into 
the ATA) picks up, the calling party sees the phone call continue with no 
audio for about 5 seconds and then disconnect.

On the answering side, the answering party picks up and gets dead air.