Samsung NX-828 Technical Manual

Also see for NX-828: User guide

Contents

You may connect up to 24 keystations to the system. More than 24 KLI connections may causeproblems with system features.3. Hardware Description3.1 Key Service Unit (KSU)The NX-828 system is a single cabinet, wall mounted, metal-cased unit containing thefollowing:°‹ Power Supply°fi System main DC regulator from AC 230V, 50Hz°fi Sinusoidal ring signal generator°fi Battery charging/ Re-charging circuitry°fi DC power regulator for single line telephones°fi +12V DC power regulator and -5V DC power regulator°‹ Connection Board.°‹ Base Board- Four (4) loop start trunk line interface circuitry with Metering Pulse Detectors(optionally, 50Hz, 12kHz or 16kHz)- Four (4) keyset interfaces and eight (8) single line telephone interfaces- 16 speech paths- Internal music source and external music interface- Two (2) power failure transfers (trunk #1, #2 - station #11, #12)- Memory back-up battery- Real-time clock- Four (4) connectors for Metering Pulse Detectors related to four (4) trunks- Connector for NX-DPH/PAGING card and NX-SMDR/R-MMC card- Three (3) expansion slots- +5V DC power regulator3.2 Option Cards°‹ NX-4TRK card provides four (4) loop start trunk interfaces, with Metering pulse Detectors(optionally, 50Hz, 12KHz or 16KHz).°‹ NX-8KLI card provides eight (8) ports for keysets.°‹ NX-8SLI card provides eight (8) single line telephones indoors.°‹ NX-4OPX card provides four (4) line telephones outdoors.°‹ NX-SMDR/R-MMC card provides two serial ports for SMDR and Remote MMC.°‹ NX-DPH/PAGING card provides two door phone interface and one external paginginterface.1 - 3NX-828 HYBRID KEY SYSTEM GENERAL DESCRIPTION