- Interface to Main Chassis- Additional Telephony Resources – for DTMF, Dial Tone/Busy Tone detection, FSK Caller ID receiver/sender- Equipped with connector for Cat5 expansion cable- Includes 3.9-ft. straight-through cat5 expansion cable, for connection to base chassis- Installs in dedicated slot in Expansion Chassis- Maximum (1) per Expansion Chassis
MiscellaneousCompatibility: NEC SL2100 Communication System