Not a Prologic.
Processor is a TN790 with a TN765 proc interface.
No alarms on the system, list measurement ds1 runs clean too!
Had a vendor meet and telco proved issue to pbx.
1 pri in pbx, and 1 connected to t-bird. The pbx pri "reset" the t-bird one did not.
I did order replacement boards, I will try the TN778 first.