My client with NEC DSX on T1/PRI is moving to new location, it will take up to 6 weeks to move the service, but he wants to relocate sooner.
I’m looking for a temporary solution.
Pots lines is not an option, system can handle 8 trunks, he needs 12.
Adding a Voip board and licenses is one of the options, but seems quite costly and will require system changes which I’m trying to avoid.
I was thinking to setup sip trunks and convert it to Pri with Adtran 908e 2nd generation. Hasn’t worked with one, but looks like manuals are available and I know someone who will help if I get stuck.
Can someone recommend another inexpensive gateway that are easy to configure?

Thanks a lot