On Tue, Mar 02, 2004 at 10:04:23AM +0000, WipeOut wrote: > On the UK DSL using G.711 you should easily get 2 concurrect calls, > G.711 uses about 84k(incl overhead) in each direction, so 2 calls would > be 168K (of the 256k)
It all to do with running IP/ATM (BT's ADSL is all over ATM) and how the multiplexing etc is done over the ATM network, such that with a 256K upstream you only really get 1/4 of the bandwidth for TOLL GRADE service. That doesn't mean you cant get more voice channels out of it, you can, but you'll start suffering on dropped packets etc. I'm sure some more knowledgable person can go into the maths behind IP/ATM and bitstuffing techniques to maintain latency and jitter. Steve -- NetTek Ltd Phone/Fax +44-(0)20 7483 2455 SMS steve-epage (at) gbnet.net [body] gpg 1024D/468952DB 2001-09-19 _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
