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:
[XXXXXXXXXX]
username=XXXXXXXXXX
type=friend
port=5060
nat=yes
host=xxx.xxx.xxx.xxx
dtmfmode=rfc2833
context=from-internal
canreinvite=no
callerid="XXXXXXXXXXX" <XXXXXXXXXXX>
allow=alaw
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.
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.
Thanks.
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