When turning up a PRI with MCI Local, using a Merlin Magix system, you'll need to do the following to adapt to their switches to make outgoing calls, I found out the hard way -
First, be sure they're running "ATT CUSTOM" for 5ESS Protocol and not some slightly different version (they...
I took on the task of converting from our maxed out partner system to a merlin magix (would have chosen another system altogether, but needed to reuse the partner phones for cost savings). Everything is setup, line and extension wise. I've removed outgoing call restrictions on the voicemail...
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