4 Circuit Frequency Shift Key (FSK) register used with 151220 PN-4LLCB to provide analog station Caller ID. Max: 4-Cards including RSTB/RSTG and RSTB-911 AP Number 4-12, Lower AP Hwy One 4RSTF required for every 130 analog CID stations/ 32.5 cards. Available 2200 Series and above. |