David If my understanding is right, MTPs also have a DP that they can be associated to ( I don't have a UCM in-front of me now). So I believe you have your MTP in the HQ Region which is talking G729 to the CUBE Trunk Region. And so with MTP its a G729 Call.
But with XCoder, which doesn't happen to have any DP, you seem to have it support both G711 & G729 Codecs. UCM will always prefer a higher quality Codec between 2 Endpoints, and so G711 is rightly being negotiated between HQ & XCoder. But the other side is CME whose incoming Dial Peer must be hardcoded to G729 & so your XCoder is converting the media stream to G729 for that feed. I hope this makes sense. Good day. Mann On Sat, Nov 13, 2010 at 10:30 PM, <ccie_voice-requ...@onlinestudylist.com> wrote: > Send CCIE_Voice mailing list submissions to > ccie_vo...@onlinestudylist.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://onlinestudylist.com/mailman/listinfo/ccie_voice > or, via email, send a message with subject or body 'help' to > ccie_voice-requ...@onlinestudylist.com > > You can reach the person managing the list at > ccie_voice-ow...@onlinestudylist.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CCIE_Voice digest..." > > > Today's Topics: > > 1. CUBE Early Offer - Transcoder vs MTP (David A) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 13 Nov 2010 11:36:48 -0500 > From: David A <david.a...@gmail.com> > To: ccie_voice@onlinestudylist.com > Subject: [OSL | CCIE_Voice] CUBE Early Offer - Transcoder vs MTP > Message-ID: > <aanlktin79qdfszb8fvwt8fczdcdwq9ecm0gjbnz+a...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi All, > > I was doing a scenario where in I have HQ gateway setup as a CUBE. > > HQ = MGCP - phones in CUCM - 5002 - Region HQ with 729 to CUBE > BR2 = CME - SCCP Phones > CUBE trunk - Region g729 with all > > I am doing Early Offer on the CUBE with inbount and outbound faststart > and it works fine > > My intial undersanding is that "mtp" is needed on HQ gateway with > g729. Call works fine and both phones use g729. > > I however configured a "transcoder" with g711 and 729 and replaced the > "mtp". Call works fine however in this case HQ phone uses g711 and CME > uses g729 and I see 2 sessions on transcoder. > > All dialpeers are g729 (default voip) > > Can someone please help me understand why the codec used on HQ is g711 > in case of transcoder and g729 incase of MTP? > > Thanks in advance > > DA > > > ------------------------------ > > _______________________________________________ > CCIE_Voice mailing list > CCIE_Voice@onlinestudylist.com > http://onlinestudylist.com/mailman/listinfo/ccie_voice > > > End of CCIE_Voice Digest, Vol 57, Issue 67 > ****************************************** > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
