asterisk users - Sep 2003 - Question about codecs and interoperability with cisco AS5350

Hi all.
I'm going to implement some large Asterisk based solution. Maybe 4-5 PCs
with 1-2 E1/T1 trunks on each.
Because some of the traffic will be sended to external VoIP provider, i has some
questions

1. Which is the lowest bandwidth consuming codec in Asterisk, which is
compatible with Cisco Gateways. Stability is needed too.

2. Have someone allready bulded such a systems and what hardware (pc i mean) is
needed

Thanks

DEBUG[1116941120]: File chan_iax.c, Line 3553 (socket_read): Ooh, voice format
changed to G729A
DEBUG[1116941120]: File chan_iax.c, Line 3864 (socket_read): We don't do
requested format G729A, falling back to peer capability 256
NOTICE[1116941120]: File chan_iax.c, Line 3867 (socket_read): Rejected connect
attempt from 24.126.69.26, requested/capability 0x100/0x100 incompatible  with
our capability 0xfc70.




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