The easiest way to do this is have your routing rule do a "send to greeting for" to another call handler that has the greeting you want to play recorded in it's alternate greeting (which over rides all the other greetings) and then have it's after greeting action set to "attempt transfer for" 5001.
Also, if you want to get rid of that "please hold on while I transfer your call" prompt, you can - however it's not TAC supported and the change is wiped out on upgrades. Here's a post with the details:
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...
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 discusses the bas...