1. Correct, that is the guideline, you need 7 Mb for 50 ports --> 50 * 90kbps per call = 4.5 Mbps + some overhead Cisco assumes :-)
2. Ports stay registered to their local UCON, so for users at data center A that UCON is going to be available and for users at data center B the other UCON is available. If there are no users at the unreachable data center then it wont be used for anything.
This is bandwidth between UCON servers, remember as message is being recorded on a port it is being replicated to the other server.
2. There is no reason to split them this way, simply configure 250 ports on SUB and 250 SUB on Pub, if one of the UCON servers is not reachable CUCM will route to the other via line group/hunt list routing when using SCCP.
I would urge you to use SIP instead of SCCP as then you dont have to worry about ports on CUCM and simply create 2 SIP trunks, one pointing to SUB and one to PUB.
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...