So your SP is removing its SIP trunk to your SIP PBX and telling you that they are now going to be providing you a PRI to your SIP PBX and thus forcing you to buy a PRI interface on your SIP PBX?
Sounds like you need a new provider! =)
That sounds crazy. What you need is the SBC feature in the ADTRAN that sits in front of SIP PBXs. SIP in from softswitch and then SIP to your PBX. You need to ask them why in the world they are forcing you to a PRI? Ask them if you can get the ADTRAN SBC software on the TA 908e.
Does that makes sense?
No this is not the case. We are currently using analog lines with our older PBX, we are not running a SIP pbx, yet....
I simply have a test asterisk setup, in which I am connecting to internet-based SIP providers to give me outside access for test purposes, and the plan is to get rid of the older pbx and switch to the asterisk PBX when we get the PRI installed.
Gotcha, sorry for the confusion. So looks like you just want a guide on how to configure the 908e to terminate a SIP trunk and pass PRI to your new Asterisks PBX.
Here are some guides:
Let me know if you have any questions.