My company has been rolling out Cisco VOIP phone systems to remote offices, and we've had a hard time with echo. I was wondering if anyone could shed some light on it.
We've done 3 sites so far, and each site needs alot of tweaking to remove the echo (changing the attenuation and gain). Each site is using a PRI to the telco, and an MPLS (pip) to headquarters. They have a cisco 3850, and end up on 7940 handsets.
Cisco seems to act like echo is rare, but 3 of the 3 sites we've done have needed significant back and forth to try and remove the echo. We've gotten rid of it in one site, but the other two are still being tweaked.