In regards to IOS, any ISR router will work for you. The CUBE is a border element that will proxy and hide your internal network from external SIP connections, such as your PSTN provider not having direct access to CUCM or CME. CUBE is a little overkill for what you need.
The size of the router will depend on the number of SIP connections coming to/from your endpoints such as avaya and OCS. Its really just SIP to SIP and dial peers on the router to make this work.
The trick is will OCS *and* avaya talk the same SIP to/from the router. 2900/3900 or 2800/3800 will work fine for your application. If its small, you can probably get away with 1800 series
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...