CallManager and CME can provide secondary dialtone like you are expecting but it seems as if your PBX is in control of the phone and dial plan so the PBX would be the one expected to provide the outside dialtone.
Based on what your PBX guys are telling you, I assume that the E1 is not ISDN. In which case, the dial-peer would be a POTS inbound dial-peer and the only thing you need to do is make sure that the 'direct-inward-dial' command is not in that dial-peer configuration. That should enable the secondary dialtone.
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...