Working on a 424, customer wants to add a T1.
Manual states
"© PRI is available on DK424 Release 4.0 systems with RCTUBA3/BB4, C3/D4, and E3/F4
processors"
Software level in programming reads as RCA4X25.
My question is what level is this and will it support a T1 card? I looks like it might be release 4 but I cannot find anything that confirms this.
Thanks