Hello all, Just my 2 cents in defense of those carriers/resellers who prefer to receive G729 calls:
:) Since most commercial VoIP carriers use G729 almost exclusively, in most cases there is no need for transcoding, (a reseller/carrier/whatever usually receives traffic in G729). In many cases there is good reason to avoid accepting anything other than the terminating side accepts (ie G729). It is not only a matter of G729 licensing costs, although nowadays that the wholesale margins are getting thinner and thinner, all costs (and especially network access costs) have a tremendous impact on the business. The main issue IMHO is that apart from licensing costs, additional transcoding causes is a degradation of audio quality: in a standard VoIP call scenario a G729 call has already been transcoded at it's originating end from another codec (for example G711a/u from an ISN network) and will be transcoded to one of the prefered codecs of the terminating end (if it's an ISDN network it will be G711a/u again). So, we already have one transcoding in our hands, and all MOS measurements are done in such scenarios. Now, if there is an additional transoding along the path of the call (example, the originating carrier sends you the call in let's say Speex or G723.1 and you transcode it to G729 before you send it to the terminating equipment), audio quality will degrade and most of the times the degradation will be serious. Also, up to now we have not even considered the fact that the audio may have already been transcoded multiple times before it reaches your equipment, as it passes along from carrier to carrier before it reaches you. This is why in our company, we always prefer to let RTP pass through rather than process it. We DO accept calls in most codecs if this is indeed the customers' preference, but we notify them that G729 is always preferred & that we will transcode from other codecs, but they need to keep in mind that audio may suffer. Best regards, Vlasis Hatzistavrou Kinetix Tele.com International Inc. 306 Victoria House, Victoria, Mahe, Seychelles Tel.: +302310556134 Fax: +302310556134 (ext. 0) GSM: +306977835653 e-mail: vh...@kinetixtele.com http://www.kinetixtele.com Postal address: Monastiriou 9& Enotikon 54627 Thessaloniki Greece On 18/3/10 4:03 μμ, C. Savinovich wrote: > I not only get it, but I also have done the calculations, the same as anyone > with 2 months experience in telecom reselling, and it happens that the > expense of trans-coding is part of the business. What kind of reseller is > it that is in the business and doesn't want to spend money in g729 > licensing? Are you going to walk away from a provider just because of his > codec, without considering his ASR, QOS, technical support, or price as > primary criteria? > > CS > > > -----Original Message----- > From: asterisk-biz-boun...@lists.digium.com > [mailto:asterisk-biz-boun...@lists.digium.com] On Behalf Of Fred Posner > Sent: Thursday, March 18, 2010 8:47 AM > To: Commercial and Business-Oriented Asterisk Discussion > Subject: Re: [asterisk-biz] Looking for Mexico Mobile Provider > > I don't think you get it. If a carrier only uses g729 and you don't want > g729 for licensing, quality, whatever, then you simply choose another > carrier. If a carrier doesn't want to tell you what codecs they are using, > then why would you choose that carrier? > > ---fred > http://qxork.com > > > > > > On Mar 18, 2010, at 8:25 AM, C. Savinovich wrote: > > >> Fine, then receive in codec X and trans-code to g729, or viceversa :) >> >> CS >> >> >> -----Original Message----- >> From: asterisk-biz-boun...@lists.digium.com >> [mailto:asterisk-biz-boun...@lists.digium.com] On Behalf Of Fred >> Posner >> Sent: Wednesday, March 17, 2010 10:02 PM >> To: Commercial and Business-Oriented Asterisk Discussion >> Subject: Re: [asterisk-biz] Looking for Mexico Mobile Provider >> >> Some carriers only allow g729. >> >> ---fred >> http://qxork.com >> >> >> >> >> >> On Mar 17, 2010, at 8:52 PM, C. Savinovich wrote: >> >> >>> What does the codec has to do on a wholesale long distance negotiation? >>> >>> CS >>> >>> -----Original Message----- >>> From: asterisk-biz-boun...@lists.digium.com >>> [mailto:asterisk-biz-boun...@lists.digium.com] On Behalf Of Fred >>> Posner >>> Sent: Wednesday, March 17, 2010 3:07 PM >>> To: Commercial and Business-Oriented Asterisk Discussion >>> Subject: Re: [asterisk-biz] Looking for Mexico Mobile Provider >>> >>> Which codec again? >>> >>> ---fred >>> http://qxork.com >>> >>> >>> >>> >>> >>> On Mar 17, 2010, at 3:01 PM, jay kordic wrote: >>> >>> >>>> Fred, >>>> I will have a Mexico Mobile available to test tomorrow with CLI, >>>> rate-.085/minute with 11+ acd. Can you use? >>>> >>>> Jay Kordic >>>> The Horizon Group >>>> Wholesale termination/origination >>>> 1-951-744-9220 (voice) >>>> 1-951-963-1298 (fax) >>>> MSN IM - jaykor...@hotmail.com >>>> Twitter- http://twitter.com/jkordic >>>> >>>> 2010 Specials >>>> 1.USA unrestricted termination @ .0097/minute with 1/1 >>>> billing,SIP/H323-G729/G711 supported. >>>> 2.USA unrestricted termination(CLI) @ .0085/minute with 1/1 >>>> billing,H323/G729 supported. >>>> 3..0039/minute for USA termination with virtual CLI/ANI(111,000+ >>>> npa/nxx's)SIP only.G711/G729. >>>> 4.India 919 mobile termination(white route) as low as >>>> .0110/minute(9194-.0129/min.) >>>> 5.Brazil Mobile-.071/minute(34% ASR/6 min. acd). >>>> 6.Pakistan White termination with CLI at .049/minute. >>>> 7.USA T.38/G711/G729 termination as low as .0095/minute (this route >>>> will take dialer traffic).6/6 billing. >>>> 8.USA unrestricted termination with CLI (g711/g729)@ >>>> .0106/minute.1/1 billing. >>>> 9.USA termination .0049/minute (100,000+npa/nxx's) with 1/1 billing >>>> >> /CLI. >> >>>> >>>> -----Original Message----- >>>> From: asterisk-biz-boun...@lists.digium.com >>>> [mailto:asterisk-biz-boun...@lists.digium.com] On Behalf Of Fred >>>> Posner >>>> Sent: Wednesday, March 17, 2010 11:40 AM >>>> To: Commercial and Business-Oriented Asterisk Discussion >>>> Subject: [asterisk-biz] Looking for Mexico Mobile Provider >>>> >>>> Looking for suggestions on a good quality / low price (yes I know >>>> that they don't go hand in hand) carrier for Mexico Mobile termination. >>>> >>>> Thanks. :) >>>> >>>> ---fred >>>> http://qxork.com >>>> >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> ____________________________________________________________________ >>>> _ >>>> -- Bandwidth and Colocation Provided by http://www.api-digital.com >>>> -- >>>> >>>> asterisk-biz mailing list >>>> To UNSUBSCRIBE or update options visit: >>>> http://lists.digium.com/mailman/listinfo/asterisk-biz >>>> >>>> >>>> -- >>>> ____________________________________________________________________ >>>> _ >>>> -- Bandwidth and Colocation Provided by http://www.api-digital.com >>>> -- >>>> >>>> asterisk-biz mailing list >>>> To UNSUBSCRIBE or update options visit: >>>> http://lists.digium.com/mailman/listinfo/asterisk-biz >>>> >>> >>> -- >>> _____________________________________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-biz mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-biz >>> >>> >>> -- >>> _____________________________________________________________________ >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >>> >>> asterisk-biz mailing list >>> To UNSUBSCRIBE or update options visit: >>> http://lists.digium.com/mailman/listinfo/asterisk-biz >>> >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-biz mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-biz >> >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> asterisk-biz mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-biz >> > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-biz mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-biz > > > -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
