On the subject of echo on a PRI, I too get this, but only when calling people in certain rate centers. Calls within my LATA (primarily VZ) are completely free of echo. Calls to a neighboring LATA (all Sprint) have echo on almost every rate center.
I wish I knew more about this so I could rip Sprint a new one and tell them to fix their trunking, but... -- Troy Settle Pulaski Networks http://www.psknet.com 866.477.5638 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Steven Critchfield > Sent: Tuesday, July 20, 2004 7:00 AM > To: [EMAIL PROTECTED] > Subject: Re: [Asterisk-Users] Echo on a PRI > > On Mon, 2004-07-19 at 19:12, David Goldfein wrote: > > Hi, > > I recently set up the following in a production system (2.8 > GHZ Xeon, 1 Gig > > Memory, Dell 2650). > > > > Telco - PRI - Asterisk - T1 - PBX > > > > I am getting an occasional noticeable echo on some of the > phone lines > > (random inbound and outbound). Everyone I ask keeps > telling me that I can't > > be having echo since I am on a PRI, which is a digital > circuit. Ok, so I > > can't be having echo, but I am! Does anyone have any ideas > of what might be > > causing the echo in this situation? > > Your PRI and the T1 itself cannot introduce echo on their > own. What you > may see though is that you are introducing a delay as you traverse the > asterisk link. Asterisk will buffer 8 bits per channel from the PRI > before it send it down the T1 line to the PBX. This is a new > delay that > is now added on to the latency your PBX introduces. > > A guess is that you also get the 2 machines fighting against > each other > on the echo. I doubt you can turn off echo cancel in the PBX so you > should try turning it off in asterisk. It should help reduce some > latency in asterisk and let the PBX handle the rest of the echo cancel > on it's own. > -- > Steven Critchfield <[EMAIL PROTECTED]> > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
