I have noticed that when a call was transferred to me from 700 to 701101 while connected through a p2p t1 in Arkansas that the echo was so bad that I would have to call the inbound caller back to have much clearer communications. I was working sales at the time for this company and they were aware of the problem but stated they could not get a fix for it. This was about 5 years ago though. I was told it was because the call routed through so many portals that this was the problem. I sure hope the got that fixed.

Tony the Phoneman