CM’s “facility test call” functionality allow administrators to place test calls on specific ports. It’s invaluable when you want to manually operate an analog line remotely – just like you’re attaching an analog phone directly to the line.
To be able to place a facility test call, you have to administer a feature access code. The feature access code needs to be within your dialplan analysis “dac” (dial access code, which is access codes for either trunks or features) or “fac” (feature access code) type.
I previously wrote about how CM determines proper inbound call delivery (inc-call-handling-trmt), but might loosely be considered the DID -> Extension association. But… the inc-call-handling-trmt tables only tell CM how to figure out which extension to which a call should be delivered; they don’t actually associate DIDs with extensions. So how does CM determine the outbound calling party number when a station/extension makes an outgoing call? Enter public-unknown-numbering.
Ever wanted to be able to echo a calling party’s phone number back to them, in much the same way a telco-provided ANI/ALI line does? Here’s a way to do it using the ANI as presented to your PBX by the PSTN.
There are a lot of vector steps, and a lot of announcements required. For the announcements specifically – the announcements that are named with only digits are simply those spoken digits (I haven’t bothered customizing this for inflection).
Incoming call handling treatment is the administrative function used to instruct CM how to route incoming calls traversing specific trunks.
Errors/alarms of maintenance name “NR-CONN” indicate a network-region connectivity failure.
