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H.323 vs MGCP vs SIP as PSTN voice gateway

Will install CCM v5.0 and planning to use SIP protocol with 3845 with T1 circuit as PSTN voice gateway. Just want to know if any unknown issues to run SIP between CCM v5.0 and Cisco 3845 with T1 circuit as PSTN voice gateway. Or should we go back to MGCP or H.323 as they are more common and stable? Thanks for the advice.

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Re: H.323 vs MGCP vs SIP as PSTN voice gateway

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