Yes, it is possible. Create a translation rule to modify the number dialed from the IP Phone to an E164 number. Now go to the call-manager-fallback mode and apply this translation rule using the command
Thanks a lot. This is good. But my case is a little bit complex here. Internal extension is 8 digits but DID is 4 digits. For example, one of the extension at home office is 20013333, 3333 is DID and his E.164 is 14166783333.When in SRST mode, if remote office user dial 20013333 , it should discard 2001 then translate it to 14166783333. My question is whether SRST also support discard digits?
Okay, so you need to have two translations here. First would be to discard 2001. Second would be to add 1416678.
The first can be done by the SRST translate command.
For the second one, add a new dial-peer like,
dial-peer voice 1 pots
When the user dials 20013333, the 2001 will be discarded by the SRST Translate rule, leaving behind 3333. Now the router will match dial-peer 1. In dial-peer 1, the prefix command will add 1416678 and the forward-digits all command will send 3333, resulting in the 14166783333 being send out to the Telco. I have not tested this out, but I believe this should work.
Here comes a question. What if in normal mode? if we define destination pattern 3333 in dialpeer 1 pots and assign it on port, then in normal mode(non SRST), how can user make off-net call if they only have one pri port,like dial 9 to access local PSTN?
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