I have a Central Office with a ISPBX that support IP Telephony. I would like to connect a Remote Office with two Cisco routers with a BRI interface. In the Remote Office I have 10 IP phones..... how can I configure the wo router to setup B channel only when I have traffic? If I use load-interval command to set the interval in what the router calculate the avarange bandwidth on the BRI interface I have the lower limit of 30 sec. Every IP call need 25kbps so if I have in the first 30 seconds 3 calls I have not enough band.
I think there is a solution for small office environment called IP Telephony Service 2.0. Do a search on CCO for the term and see if it solve your problem. The old name was Keyswitch system in which a router can do call routing. Hope that help.
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