This post is merely a log of a particular troubleshooting experience initiated by CM IPMEDPRO alarms.
Connecting a paging system to a Communication Manager gateway as a station is significantly less complex than connecting it as a CO trunk. Compare this post to my immediately previous post about paging via trunks.
Most users understand that “to get an outside line”, they have to dial some number first – most commonly the digit 9, but sometimes other digits are used. When the user does that, they’re triggering Automatic Route Selection (ARS) functionality, which tells the phone system to automatically figure out how to route the digits that follow the access code.