I have some basic (I think) questions regarding a SIP-trunk setup to a CUCMBE 6.1.5.
Can I do a straight up authenticated connection from the SIP-provider to the CUCM without use of CUBE in the middle? I have a 2851 router with a E1 talking mgcp with the CUCM as it is now but the customer want to go all out SIP. Since I've got an ip-address from the ISP for use with SIP in a point-to-point connection, can I configure more than 1 interface on the CUCM (as in 1 internal and 1 external (SIP))? The server comes with dual NICs if I'm not mistaken and that could of course do the trick if both are configurable in the CUCM.
If I need the CUBE function, can I use the 2851 as it is now or do I have to upgrade it? I was hoping this was a built in feature in the IOS and "just" a configuration issue if needed.
Please help me out here, I really need your expertise.
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