I am guessing that you are wanting you use a "hot line" type functionality which is traditionally called private line automatic ring-down (PLAR). Here is a TID that explains how to configure it on the CCM side:
As far as physical connectivity to telco you are going to have to determine what type of line and what type of equipment you are using on the far side to determine what type of interface you will require in your 28xx but it will probably be an FXO.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
[toc:faq]CUCM Database Replication is an area in which Cisco customers
and partners have asked for more in-depth training in being able to
properly assess a replication problem and potentially resolve an issue
without involving TAC. This document discusse...