Hi,
I think the choppy sound problem with Cisco 7940/7960 through IAX is
back... at least when trunk is enabled.
The old issue was:
http://lists.digium.com/pipermail/asterisk-users/2004-April/043280.html
Diagram of the network:
Cisco 7940 -> SIP G.711U -> Asterisk A -> IAX G.729 -> Asterisk B
->
X100P -> PSTN
With trunk=yes audio to Cisco is choppy. With trunk=no the problem
disappears.
I tried several combinations of G.711U and G.729 in the SIP and IAX
links but the problem remains.
Tried calling serveral Asterisk servers (Asterisk A -> Asterisk C,
Asterisk A -> Asterisk D) and the same problem occurs so it's not
specific between this 2 Asterisk servers.
This only happens with Cisco 7940. Switching 7940 for an Grandstream
BT100, Cisco 7905, Avaya 4602, Digium IAXy, Snom 105 or X-Pro the
problem disappears.
I don't have other Cisco 7940 unit to test but since it make SIP->SIP
and SIP->ZAP calls with no problem i think the problem is not on the
device itself.
One difference from the old issue is that the firmware of the Cisco is
not 6.x, it's 7.x (POS3-07-2-00).
Both Asterisk servers running 1.0.1 release.
Any ideas ?
Is there any test or debbuging i can post to help ?
Thanks,
Leonardo
Some related configuration:
sip.conf:
[general]
port=5060
bindaddr=0.0.0.0
canreinvite=no
tos=lowdelay
[7940]
context=7940_out
type=friend
username=7940
md5secret=xxxx
accountcode=7940
mailbox=7940
nat=no
host=dynamic
qualify=yes
callgroup=3
pickupgroup=3
disallow=all
allow=ulaw
iax.conf:
[general]
port=4569
tos=lowdelay
[asteriskb]
type=friend
username=asteriskb
host=dynamic
auth=rsa
inkeys=asteriskb
outkeys=asteriska
qualify=yes
context=asteriskb_in
trunk=yes
disallow=all
allow=g729
--
Leonardo Gomes Figueira
sabbath@planetarium.com.br