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Asterisk Integration with CUCM

Hello Everyone,

I'm looking into Voicemail options that my organization may be able to use in the event that our current server bites the dust, it's kind of old and integrated with our analog PBX. This search led me to Asterisk, which seems to have the capability to function with auto-attendant and voicemail capabilities. I've also read that it can be connected to a CUCM via a SIP trunk with a little configuration, as well as some integration capabilities it has with SCCP.

This leads me to ask, does anyone on this forum have experience with using an Asterisk server to support their CUCM setup? Secondly, would an SCCP phone be able to reach the Asterisk via the CUCM or would it get stopped at the SIP trunk?