Our telco (Virgin Media Business, UK) have asked for some information about the PBX (UC540) in order to correctly configure ISDN PRI (E1 - ISDN30) at their end. We have a VWIC2-1MFT-T1/E1 voice interface card installed in the UC.
Specifically they want to know three things: Signalling Protocol, Outbound CLI, DDI Digit Presentation -- but I'm not sure what these mean and which settings would work with the UC540.
This, Outbound CLI, sounds like Outbound Caller ID. I'm not sure if this refers to the name or number. We can control the caller ID number, and they will be responsbile for the caller ID name.
DDI Digit Presentation, is how many digits they present to us on a call on the called number. We can support variable DDI lengths, usually it is best for management purposes to just have them send the full DDI.
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