Cisco Unified Communications Manager Express System Administrator. LTI transcoding on Cisco. 50 dial-peer voice 100 voip voice-class codec. Asterisk config codecs.conf. And doesn't affect the bitrate, but basically tells the codec how hard to search for the 'best' bits to represent the speech.

Its down to quality, size and licennsing issues. The G711 codec is very good quality but in real terms can use up to 80kbit/s of bandwidth so if you are sending the calls over the internet you need to get a high speed internet connection in order to be able to handle a lot of calls. Tai Cool Edit Pro 2.1 Full Crack. G711 is therefore ideal for calls over the local LAN. When you want to send calls over the internet or a leased line you want a lower bandwidth codec. Nexo Selenia 4.12 Manual. You can use something like GSM or iLBC which is free to use but not as good quality as some commercial codecs like G729 which you have to pay a license to use.

You may therefore want to run G711 over your LAN and get a license to use G729 over your internet connection. I just answered this question in another forum.

Why use VoIP transcoding? To save bandwidth. Why do you have to pay more for it?

Royalties and liscenses. To start here are the basics: G.711a is a low compression codec that transmits at 64kbps with low complexity and an average MOS of 4.5 G.729a is a low to medium compression codec that transmits at 28kbps medium complexity and an average MOS score of 4 The bigest problem with G.729a is the transmition of the DTMF tone.

One in every 12 tones will be misinterpreted on average. You can avoid this buy either using AVT or another DTMF relay??RFC2388??? That transmits the tone at the FXO.

If you are using this as a PBX install with out and remote offices it makes complete sense to use g.711a, a standard office's layer 2 switch will be able to carry 100Mbs which is more than enough to handle 1428 concurent calls if the PBX proccessor/liscense can handle that. If there are remote offices you are connecting I would go with the lower bandwidth codect due to the excessive cost of bandwidth on secure connections. If it is on an uplink to a VoIP trunk from a carrier I would contact the carrier to see if they supprt the DTMF relay. If not I would deffinately use G.711a because this will carry the most VoIP traffic.

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