On Tue, Nov 30, 2010 at 11:25, Carlos Chavez <[email protected]>wrote:
> I am having a problem with a Rhino channelbank. I have an Asterisk > server running 1.6.2.9 and DAHDI 2.4.0 on a CentOS 5.5 system. We have > a TE420 card with the first port used in E1 mode (R2, 20 channels) and > the fourth is in T1 mode for the channelbank. We are using MG2 echo > cancellation. > > The Rhino unit has 12 FXO ports. Five are GSM adapters and another > five are regular phone lines. We are having problems with the GSM lines > at the moment. When we enable MG2 on those lines we get dropped calls > or noise or the call cannot go through. If I disable eco cancellation > it mostly works (one port still drops the call almost immediately) but > there is echo. > > Here is the DAHDI configuration: > > # Span 4: TE4/0/4 "T4XXP (PCI) Card 0 Span 4" B8ZS/ESF > span=2,2,0,esf,b8zs > # termtype: te > fxsks=94-105 > #echocanceller=mg2,94-105 > > Here is chan_dahdi.conf > ; Span 4: TE4/0/4 "T4XXP (PCI) Card 0 Span 4" B8ZS/ESF > group=4 > context=from-pstn > signalling = fxs_ks > accountcode=Celulares > faxdetect=no > echocancel=no > echocancelwhenbridged=no > echotraining=no > channel => 94-97,104-105 > > Does anyone have any suggestions on how to enable echo cancellation > on > the Rhino Channelbank? > > -- > Telecomunicaciones Abiertas de México S.A. de C.V. > Carlos Chávez Prats > Director de Tecnología > +52-55-91169161 ext 2001 > > Hello Carlos, Channel banks do not have any echo-cancellation to be enabled, they are a simple pass-through device. I suspect the echo you are hearing is the result of an impedance mis-match, especially since this is only happening with your GSM adapters. I would suggest opening a support ticket with us directly, http://support.rhinoequipment.com, and be sure to include all the details you can such as the make and model of the GSM adapters. One other test you might try - If you connect a regular telephone directly to one of the GSM adapters, do you hear echo? -- Regards, Bryce Chidester Rhino Equipment Corp.
-- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
