Outlined here is how I got Nortel/Avaya series 1140e/1120e/1160 series phones and also 1230 phones using SIP to work with Asterisk. And they WORK. No problems. Hundreds registered, tens of thousands of calls.
I followed Michael McNamara's Link (this guy has forgotten more about Nortel stuff than I will ever know!) to get things running and its well written and should be read. I'm just another resource trying to save this info.
The asterisk version I used is built on CENTOS 6.7 using IncrediblePBX 13-12.2
UPDATE: I've since deployed it on FreePBX distro's 10.13.66 and Elastix 2.5 as well.
We'll be focusing on the 1120e series of phones for our example, but you can just substitue any 11XX reference with your own phone model (1120/40/60 and 1230)
If you bought an 1140 off ebay, and don't have a licence server, it will still work, but you will be limited on some features. The one that seemed to jump out at me the most was USB headset wouldn't work. Mostly everything else does.
High-level for this document
- Factory reset the phone
- Upgrade Phone to SIP firmware
- Create Extension in Asterisk
- Create the configuration files for your specific installation
- SpeedDial list on your phones