I'm trying to connect a 3com 3102 3c10402b ip phone as a sip phone in an avaya cm 5.2 ses, will it work?

SOURCE: Cisco 7960G IP Phone Problem

Try to manually reset the phone - **#"Settings" (this will unlock the configuration) + Network + menu under number "33" - erase the configuration. Then the phone configuration will be erased. Also you can manually set IP address and TFTP server

SOURCE: Avaya 5610 IP Phone

Press mute reset (mute 73738)

SOURCE: How to configure Avaya's IP Phone 5610?

What IP did you give the phone? When it says discover, its looking for the call server, which it is not finding.

Which system is this on? If IP office, you may need to build an IP route in the system for that subnet.

SOURCE: Using AVAYA 4610SW IP phone

Answer to the second problem :-

1. The changes in the ring tone has to be made by accessing the Avaya server where the phones are registered.
2. Log in to the avaya server...... enter change station <station number> on the command prompt
3. In the personalized ring pattern field, you can select one out of the 8 available options by typing any digit between from 1 to 8.

4. The ring pattern of that particular station will change accordingly.

5. Keep the personalized ring pattern of all the stations different by assigning different digits against this value

SOURCE: Cisco IP Phone 7940 and 3com nbx as 3rd party SIP phones

Find detailed configuration guide on how to setup Cisco UCM with Ozeki VoIP SIP SDK at: http://www.voip-sip-sdk.com/p_42-how-to-setup-ozeki-voip-sip-sdk-with-cisco-unified-communications-manager-voip.html or with 3CX at: http://www.voip-sip-sdk.com/p_124-voip-sip-sdk-3cx-voip.html