fun update: after joining the cut bridge, spectrum said it was NEC's issue. So I sent the wiresharks of the NEC not receiving Ack from the SBC.
Come to find out after a manager got on the phone, there is a Spectrum Camient Server network issue. Have had other customers with this issue for over 2 weeks. So guess I'm in limbo, but at least it's confirmed not on the NEC side.
