Is the quality the same incoming from mobile as outgoing to mobile?
On Wed, Jul 30, 2014 at 4:51 AM, A J Stiles <[email protected]> wrote: > I'm having a problem with a new SIP trunk. > > Calls within the UK to fixed lines are fine, but calls to mobiles have > noticeably poorer audio quality. > > I thought it might have been a codec issue; we have used G.726 for internal > and external calls (over primary ISDN and GSM). So I tried allowing > "alaw", > (G.711 A-law) which is the native codec used within the PSTN in this > country, > but this made no improvement. > > We had > disallow=all > allow=g726 > > in the [general] section of sip.conf. In the section for one of the > phones, I > added > allow=alaw > and then inserted > Set(SIP_CODEC=alaw) > in the relevant part of extensions.conf. For good measure, I also added > NoOp(Codec was ${SIP_CODEC}) > in the "h" extension. The messages in the Asterisk CLI appeared to show > that > the audio codec was correctly being set to "alaw", and on hangup I got > "Codec > was alaw", but there was no improvement to the sound quality. > > Is there something I am doing wrong, or do I need to get in touch with our > SIP > trunk provider? > > -- > AJS > > Note: Originating address only accepts e-mail from list! If replying off- > list, change address to asterisk1list at earthshod dot co dot uk . > > -- > _____________________________________________________________________ > -- 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 >
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