We currently use a Nortel Option 11 phone system in our multi tenant facility. We have been told that the Option 11 back plane is failing and we need to replace this phone switch. It currently have 2 - PRI's plugged into it and has roughly 150 handsets.
I also have an asterisk box built running 1.8 and Freepbx in a vmware environment and I have an Adtran 908e 2nd Generation and I would like to have the Adtran 908e create a sip trunk to the Asterisk Box and a Sip Trunk out to my new Long distance SIP Provider. Then have one of the T1's on the Adtran plug into my Phone providers PRI and the 2nd T1 port plug in to my old Nortel phone switch so that I can easily migrate users from the Option 11 to the asterisk system 1 tenant at a time by moving the DID from the T1 to the Sip Trunk.