We are currently considering switching over to a Asterisk PBX and have been looking into GigE IP phones that would be compatible with the Asterisk PBX â€“ we want to be able to maintain the GigE connectivity we have between our desktop PCs and the rest of the internal network without having to run additional network cable to all of our desks or having to use a GigE switch at each desk with an IP phone.
We found GigE phones from Cisco, Nortel, 3Com and ShoreTel, and we really like the Nortel 1120E and 1140E IP Phones, but weâ€™re concerned about their compatibility with the Asterisk PBX. I went to the Nortel website and found the release notes for the latest version of the SIP firmware Nortel offers for the 1120E and 1140E phones:
Both phones can be ordered with the SIP version of the firmware preloaded at the factory. One thing that encouraged me is that they offer support for the third party BroadSoft BroadWorks server. The Nortel phones claim that they are SIP RFC3261 compliant which is what the Grandstream GXP2000 phone claims to be as well and I know that the Grandstream GXP2000 phone is supposed to work just fine with the Asterisk PBX.
If I understand the situation correctly, I believe itâ€™s standards-based SIP compliance that is the basis for the compatibility of most IP phones that are compatible with the Asterisk PBX â€“ such as Ciscoâ€™s 7900 IP phone series.
Nortel seems to imply this very strongly on the web pages for the 1120E and 1140E models:
â€œFlexible deployment options with support of both Nortel Communication Server protocol and standards-based Session Initiation Protocolâ€