we have ATT VoIP service and at one location i have a perplexing issue.
the service will stop responding to “OPTIONS” 12.194 is ATT and 10.20 is the asterisk running 11.25.3
(Please see below) normally i see line 1 as ATT sending “OPTIONS” and in line 2 the Asterisk responds 200 OK
then in line 3 when asterisk requests “OPTIONS” the asterisk in line 4 reply’s with |ICMP|505|Destination unreachable.
Please any help to understand this and how to resolve.
|1 12.194.XXX.XXX|10.20.XXX.XXX|SIP|472|Request: OPTIONS sip:10.20.XXX.XXX:5060 | |
|2 10.20.XXX.XXX|12.194.XXX.XXX|SIP|603|Status: 200 OK | |
|3 12.194.XXX.XXX|10.20.XXX.XXX|SIP|477|Request: OPTIONS sip:10.20.XXX.XXX:5060 | |
|4 10.20.XXX.XXX|12.194.XXX.XXX|ICMP|505|Destination unreachable (Port unreachable)|