sundance-communications.com Forums Telephony Discussion Phone & VoIP Systems NEC Telephones & Systems Echoing on SL100 VOIP

We have a customer that has 2 building. We have installed 4 VOIP sets at the remote end. The 2 buildings are linked together using VPN through the internet p[provided by Shaw. The 4 phones experience echoing when they are on a telephone call. Sometimes it is really noticeable and other times it is not as bad. It happens on local calls between the two buildings and on calls outside of the system. We have tried changing setting on the switches and routers but the echoing is still there. Has anyone seen anything like this, could it be a Shaw.

Muddy

Try NAT.