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Remote site---signalling over WAN, voice over PSTN


I must design a configuration with a -existing-Callmanager at headquarters and a -new-remote site with 134 users. There is not enough bandwith on the -existing-WAN and the customer wants the -skinny-signalling over the WAN(frame-relay) and the voice path via the PSTN (dialup-ISDN30). We will use a 3640 with SRST for 48 users and 1 ISDN30, wich also will be used for external calls to PSTN.

Is this possible ???


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Re: Remote site---signalling over WAN, voice over PSTN

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Re: Remote site---signalling over WAN, voice over PSTN

Yes its possible.

Your using a centralised model.Obviously your phones at remote end will register with a different device pool and will you use the pstn gateway on the 3640 .call setup and teardown will be provided by the CM at headquarters.You would use regions with G729 codec for calls across wan reducing bandwidth keep alives would use approx 24kbit p sec for 150 phones.