Hi, Remember that the EC chip does cancellation only for the echo that You cause not the far end echo. So if all You have are digital (ISDN) phones, no PBX + lengthly cables or multiple A/D D/A conversion nor strange SIP inside than 25ms is OK. 25ms is not ok if You use cheap SIP phones (with no EC) in LAN conditions where jitterbuffer is above 25ms.
To sum it up - Patton 463X + all digital setup (good SIP or ISDN terminals) = no echo towards PSTN Patton 463X + cheap PBX with analog phones or analog SIP ATAs and mismatched impedance = possible echo Patton 463X are popular here in Poland and so far no echo problems. Pawel, > I'm not sure if patton actually stock/sells bra sn's in the US though. > -----Original Message----- > From: "Kristian D. Guntzelman" <kristian.guntzel...@realworldtime.com> > Cc: sipx-users@list.sipfoundry.org <sipx-users@list.sipfoundry.org> > > Sent: 9/8/2009 4:12:41 PM > Subject: Re: [sipx-users] Fwd: Patton smartnode 463x : is 25ms echocancel > tailenough ? > > ISDN-BRI?!? Sure we do, just not very much these days. It was known as the > "poor man's PRI" back when PRIs were ungodly expensive. > > Supports 2b+d and was used primarily for Polycom Video conferencing and data > circuits. Comes in two variants. BRI-U (2-wire) and BRI-S/T (4-wire) > > - > Kris Guntzelman > > Sent from my iPhone > > On Sep 8, 2009, at 2:24 PM, "Picher, Michael" > <mpic...@cmctechgroup.com<mailto:mpic...@cmctechgroup.com>> wrote: > > We don’t have BRI here in the US… > > From: > sipx-users-boun...@list.sipfoundry.org<mailto:sipx-users-boun...@list.sipfoundry.org> > [mailto:sipx-users-boun...@list.sipfoundry.org] On Behalf Of Gaëtan Minet > Sent: Tuesday, September 08, 2009 11:15 AM > To: <mailto:sipx-users@list.sipfoundry.org> > sipx-users@list.sipfoundry.org<mailto:sipx-users@list.sipfoundry.org> > Subject: [sipx-users] Fwd: Patton smartnode 463x : is 25ms echo cancel > tailenough ? > > Hi, > > Nobody is using these ? > > Gaetan > > > Begin forwarded message: > > > From: Gaëtan Minet > <<mailto:gminet...@mcit.be>gminet...@mcit.be<mailto:gminet...@mcit.be>> > Date: Thu 27 Aug 2009 14:22:28 GMT+02:00 > To: <mailto:sipx-users@list.sipfoundry.org> > sipx-users@list.sipfoundry.org<mailto:sipx-users@list.sipfoundry.org> > Subject: [sipx-users] Patton smartnode 463x : is 25ms echo cancel tail enough > ? > > Hi, > > Are some of you using Patton smartnode BRI gateways ? I see the > hardware EC is only 25ms (PRI one have 128ms). > Is this tail long enough for PSTN connection under regular usage ? > > Thanks for your feedback > > regards, > > Gaetan > _______________________________________________ sipx-users mailing list sipx-users@list.sipfoundry.org List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users sipXecs IP PBX -- http://www.sipfoundry.org/
