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I've experiencing some difficulty passing inbound calls from the PSTN, through a large Asterisk switch and down our network to a Cisco 1751 router. This router has 4 FXS ports and is running IOS 12.3.<BR>
<BR>
Outbound dialing from phones on the FXS ports of the router works flawlessly, but inbound calls fail as though the Asterisk server does not see the extensions representing the FXS ports as available or registered. There is little to lead me to believe that IOS will support a port-over-port SIP registration with Asterisk, so I have configured sip_additional.conf with the following format for each extension on the 1751:<BR>
<BR>
[XXXXXXXXXX]<BR>
username=XXXXXXXXXX<BR>
type=friend<BR>
port=5060<BR>
nat=yes<BR>
host=xxx.xxx.xxx.xxx<BR>
dtmfmode=rfc2833<BR>
context=from-internal<BR>
canreinvite=no<BR>
callerid="XXXXXXXXXXX" <XXXXXXXXXXX><BR>
allow=alaw<BR>
<BR>
I am relatively confident that my problem does not exist at the 1751 due to the ability to flawlessly process outgoing calls. However, after more than a day in this one, I guess anything is possible.<BR>
<BR>
Does anybody out there have any experiencing sending SIP down-wire from Asterisk to the Cisco IOS? We might be willing to pay for the right kind of help here.<BR>
<BR>
Thanks.
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