On 9/03/2009 8:08 a.m., Elliot Murdock wrote: > Hello Gordon, > > Aside from alaw and ulaw, we also use G729. > > I am not that familiar as to how Asterisk converts PRI signals into > coded format, but why wouldn't any transcoding be necessary for alaw > and ulaw codecs?
Because a T1 uses mulaw and an E1 uses alaw (except in some E1 connections in Japan - which use ulaw). If your phones are also using ulaw then the signal would not need to be transcoded - there's really very little reason to use anything other that alaw/ulaw in a LAN situation - the only reason you would want to use G729 etc is if you have bandwidth issues. -- Kind Regards, Matt Riddell Director _______________________________________________ http://www.venturevoip.com (Great new VoIP end to end solution) http://www.venturevoip.com/news.php (Daily Asterisk News - html) http://www.venturevoip.com/newrssfeed.php (Daily Asterisk News - rss) _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
