I have a 2621 router running 12.1(5)YD5 with 2 FXO ports, outbound calls go out the FXO and my call manager is connected via the WAN created by a PIX-PIX VPN. When my WAN goes down, the phones go into fallback mode but do not recieve inbound calls and when I make an outbound call, I can hear the person I call but they can't hear me. My router config is:
ip source-address 172.16.2.253 port 2000 strict-match
You are using the access-list to block all Skinny packets to and from the IP Phones to simulate a WAN Down, right. The WAN is not actually down, right.
Because of the access-list, the phones will go to Fallback mode. But the FXO ports are setup to send calls to extension 100 and they will use Dial-peer 1 and the calls will be routed to Callmanager using H323, since H323 ports are not blocked by the access list. To the Callmanager, these phones are no longer registerd to it, that could be why incoming calls are failing. If you have Callforward busy or no answer setup for these phones, then Callmanager will send the call to that destination.
Try the same test after shutting down dial-peer 1 and see what happens.
For the one way voice with outgoing calls, try issuing this command in global mode
Do you have any phone at the remote site with X 100? If yes, then this will work. Since your dial-peer 1 is 1.. and the IP phone registers as 100, when the router does the digit analysis, the phone will be matched first.
If X 100 not at the remote site now, as an alternate solution, you can add X 100 to one of the remote site phones in a different partition and setup the CSS of the gateway so that it does not include the new partition. This way when the WAN is up, the gateway cannot reach X 100 at the remote site. But when the WAN is down, X 100 will register with the SRST gateway and incoming calls will get through.
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