On Jul 30, 2009, at 8:27 AM, DA wrote: > > We have a carrier that we receive calls from over SIP. They are > getting > the call from the PSTN and then sending to us as sip. We then get > other > calls to our FS via sip from other carriers that are also from the > PSTN. > We bridge these calls in FS. All connections to FS are sip. So. > > Party1--PSTN--Carrier1--FS--Carrier2--PSTN-party2 > > Problem is that Party2 hears echo of themselves. We chased it down > and > Carrier1 says it is because Party1's carrier is setting a bit in the > ss7 > connection that they are doing echo cancel (when in fact, they are > not). > So Carrier1 does not do any EC on the call before passing it to us.
I would take it up with the carrier since that is the point where the echo is introduced. > > Is there any way that I could do the EC on this call in FS? Nope. > >> From what I have read on the list, it looks like the Zaptel >> Hardware or > OSLEC type of EC would not work here since there is no zaptel/t1 > connection involved with FS. Only on TDM, You do not need EC on VOIP to VOIP calls. > > _______________________________________________ FreeSWITCH-users mailing list [email protected] http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
