When considering the Phone Type you must also consider the license you need to run that phone. If you are using the Call Manager 6.x and not running CUWL you will need more DLU's depending on the tpe of phone. If you buy phones that are not standard it will require more DLU's to make it operational. Cisco's little way to make it more cost effective to use their product. It might be cheaper to buy a non-cisco phone but it will cost you more in license if that is the direction you go in.
2. very wide. basically, with a third-party SIP phone, no feature is guaranteed to work. It may work after you research on, asthe TAC won't help (even if you pay a license).
Then you have the added overhead of managing tow different sets of devices and having to explaining to user why something that can be done with one, it cannot with the other, handle the migrations, etc.
There may be such a document, but it may not helps as much, because beancounters will understand that third party SIP == cisco SIP, thing that is far from true.
Your best defense may be that CCM is largely a system built on proprietary protocol for enhanced performances and features. Once you deviate from the proprietary part, you renounce to the features as well.
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...