4. HARDWARE DESCRIPTION4.1 KSU (Key Service Unit)
The KSU of the NX-series is a single cabinet, wall mounted, metal cased unit,
containing the following:
Power Supply
Processing, switching, and customer memory for all ports.
Internal music source and External music interface
2 Power Failure Transfer
Back-up Battery for memory protection
Real Time Clock (RTC)
NX-308 SYSTEM NX-820 SYSTEM NX-1232 SYSTEM
3 Trunk interfaces 4 Trunk interfaces 8 Trunk interfaces
1 keyset, 7 Hybrid 4 KTS and 8 SLT 8 hybrid and 8 SLT
station interfaces station interfaces station interfaces
4.2 EXPANSION CARDS & OPTION BOARDS
NX-2TRK card provides two loop start trunk interfaces.
can be installed NX-820 and NX-1232 system.
NX-4TRK card provides four loop start trunk interfaces.
can be installed NX-820 and NX-1232 system.
NX-4KLI card provides four ports for keysets.
can be installed NX-820 and NX-1232 system.
NX-4SLI card provides four SLI ports for industry standard single line telephones.
can be installed NX-820 and NX-1232 system.
NX-4OPX card provides four OPX line port for industry standard single line
telephones and can be connected to PBX lines.
can be installed NX-820 and NX-1232 system.
NX-8KLI card provides eight ports for keysets.
can be installed NX-820 and NX-1232 system.
NX-8SLI card provides eight SLI port for industry standard single line telephones.
can be installed NX-820 and NX-1232 system.
NX-MPD board provides two ports for metering pulse detection.
can be installed NX-820 and NX-1232 system.
NX-PRS board provides two ports for polarity reverse signal detection.
can be installed NX-820 and NX-1232 system.
NX-SMDR/R-MMC board provides two serial ports for SMDR and
REMOTE MMC.
can be installed all NX-SERIES system.
NX-DPH/PAGING board provides two DOOR PHONE interface and one
EXTERNAL PAGING interface.
can be installed all NX-SERIES system.
NX-SERIES HYBRID KEY SYSTEM GENERAL DESCRIPTION SECTION