The PA-8RSTY-A circuit card is equipped with eight circuits of registers and senders.
Mnfr. Part #: PA-8RSTY-A
NEC NEAX 2400 8-Circuit Register Sender Trunk Card
Contains Dial Pulse Register (DPR), Push Button Receiver (PBR) for receiving digits from extensions and/or the associated incoming trunks and Dial Pulse Sender (DPS), PB Signal Sender (PBS) for sending digits to a distant switching system
Has Register Sender function, by which inter-digit pause can be changed and PB signals may be converted to DP signals and vice versa without intervention of the CPU
Can be used for Caller ID service and caller ID on Call Waiting service