Well lots of learning about the old Nortel 1120e and 1140e sets, and I guess they were marvels for their time in the early 2000's when engineered and built in the late 2000s.
I was able to upgrade the 1120e to SIP V3 (my sample of the product is first-gen which doesn't get V4 support) and the 1140e to SIP V4.
There's quite a bit of 'already researched' work by others out there on this topic, its just -what keywords to use to find- but I was able to connect both of these (now with Avaya SIP firmware on them) to my Grandstream UCM6302. (Doing the legwork for interop testing for a customer who wants to use our Grandstream PBX we've installed as a Nurse Call middle-ware server/call manipulator for the Nurse Call notifications)
The SIP software is basic - it does connect and work as a single line phone with the standard basic SIP functionality (transfer, conference, DND, HOLD, voicemail lamp control) but I can't seem to get more than 1 line on each set. Documentation says its possible but perhaps I need the absolute latest version of firmware because both sets ignore the additional line key login programming.
Programming is really only done by creating a text document and having that document pulled by the set using TFTP or HTTP, same as how firmware gets sent. No built-in webpage we've come to enjoy on more recent products. Keypad programming is limited to IP address connectivity info to get it on the network, and provisioning server info to tell it where to get its programming. Programming keys beyond line key to get it logged into the PBX must be done through non-intuitive button pressing on the keypad.
Was a fun interop testing project. Now the customer can make decisions about what they want to do for an upgrade. (keep all their old Nortel IP phones but with very basic connectivity and buttons that we wouldn't program for them, or upgrade the desk sets.) These sets seem physically quite well made, some of the buttons are a little glitchy but dialing and audio quality seem quite good.
Thanks for the help guys
