Samsung NX-308 Manuale utente
SAMSUNG TELECOMS
Publication Information
Samsung Telecoms reserves the right without prior notice to revise
information in this publication for any reason.
Samsung Telecoms also reserves the right without prior notice to make
changes in design or components of equipment as engineering and
manufacturing may warrant.
Copyright 1998
Samsung Telecoms
All rights reserved. No part of this manual may be reproduced in any form or
by any means - graphic, electronic or mechanical, including recording,
taping, photocopy or information retrieval system - without express written
permission of the publisher of this material.
NOVEMBER/98
1
Contents
Introduction 3
General Description
System Overview 6
Specifications 9
Installation
Installation Requirements
Site planning 12
Electrical specifications 12
Installation Procedure
Mounting the KSU 14
Grounding the KSU 14
Connecting keysets 17
Connecting single line telephones 17
Internal music source 19
External music source connections 20
External system paging connections 20
Connecting door phone and lock control 20
Connecting PSTN lines 21
Power Failure Transfer 21
AC power connection 22
Connecting system back-up battery 22
Memory protection 22
Installing surge protection equipment 23
Before power on 23
Figures
Figure 1 KSU Layout 13
Figure 2 KSU Dimensions 15
Figure 3 KSU Connection Table 16
Figure 4 Base Board Switch Locations 18
System Programming
Levels of Programming 26
Station 26
User (Customer) 26
Technician 27
Programming Procedures 28
MMC Index 52
2
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Instroduction
4
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5
GENERAL
DESCRIPTION
6
System Overview
System Operation
NX-308 system is a stored-program-controlled electronic key/hybrid telephone system ready to use as
soon as it is turned on. A powerful 8031 microprocessor operating at 11.059 MHz digitally controls all
speech paths and system functions. The operating program with default memory is stored in non-
volatile ROM, 27512. Customer data is stored in RAM, 62256, and protected by a Ni-Cd battery for up
to thirty days’continuous loss of system power. When AC power is restored, the Ni-Cd battery is
recharged.
There is a maximum capacity of three (3) telephone lines and eight (8) stations of which six (6) stations
can be easily selected as keysets and single line telephones.
Comprising only a key service unit (KSU), electronic keysets and conventional single line telephones,
NX-308 offers small business users flexibility and control of telephone communications.
System Configuration
NX-308 system comprises a KSU, proprietary electronic keysets, conventional single line telephones,
proprietary door phones, and conventional additional feature equipment. The plastic-cased KSU
provides all the powerful features itself, making for easy, convenient installation and maintenance.
The KSU is equipped to operate three (3) telephone lines and eight (8) stations. Stations from 1 to 2
are assigned for electronic keysets; stations from 3 to 8 are assigned to be used with either single line
telephones or keysets.
NX - 308 is a fully non-blocking system.
Circuit Type Location Number
Electronic Keyset Station 1 to 8
Single Line Telephone Station 3 to 8
C.O./PBX Line (loop start) Trunk 1 to 3
System Hardware
Key Service Unit (KSU)
The KSU is a single-cabinet, wall-mounted, plastic-cased unit measuring 420mm (H) x 300mm (W) x
84mm (D), and weighing 4.5 kg. It contains the following assemblies:
Power Supply - provides all the regulated DC voltages necessary for system operating from 220V
AC power. Also contains a charge/discharge circuit for 24V external battery back-up connections
and ring generator for conventional single line telephones.
Base Board - the main printed circuit board that contains CPU memory, common control, and
switching circuitry. Provides interfaces for telephone lines 1 through 3, stations 1 through 8, and
these additional features:
Music on hold & background music source
External paging
Power fail transfers for lines 1 through 2
One door phone with lock release contact
Also contains memory back-up battery and real-time clock.
7
Stations 1-2 for keysets, and stations 3-8 for keysets or single line telephones, are switch-
selected.
Door Phone/Room Monitor
This is an optional wall-mounted unit containing a call button, microphone and speaker. It connects to
the KSU via two pair twisted wiring and does not take up a C.O. line or station position. Only one is
allowed per system.
The door phone provided by Samsung Electronics is commonly used for all Samsung key/hybrid
telephone systems. Other types cannot operate with these systems.
A door lock release unit may be connected to operate together with the door phone. To install the unit,
refer to the Installation section of this manual.
Telephones
Two types of telephone sets can be connected to the NX-308 system: proprietary electronic keysets and
conventional single line telephone sets.
The NX-308 24 Button Display keyset has the following standard features plus a large, easy to read,
one-line, 16-character liquid crystal display.
Standard Features
Full speakerphone capability.
Keyset comes as a desk model with reversible base wedge and handset clip for wall mounting at no
extra cost.
Handset and base cord connectors are designed with strain relief channels for longer cord life and
more static-free connections.
46 buttons configured as follows:
12 dial buttons (from 0 to )
3 C.O. line buttons with red and green LED indications
8 DSS/BLF (1-8) buttons that also function as eight personal speed dial buttons
8 speed dial buttons (9-16)
15 feature buttons:
Door Phone - DOOR
Call Pick-up - PICKUP
Group Listening - GRP.LISTEN
Internal Page - INT.PAGE
Attendant - ATTENDANT
Alarm/Speed dial - ALM/SD
Message - MSG
Conference - CONF
External Page - PAGE
Speaker - SPK
Last number redial - RD
Mute/Do Not Disturb - MUTE/DND
Hold - HOLD
Auto-Redial
Call-Back.
Two +/- push button volume selectors on front of keyset.
8
Convenient pull-out tray under keyset for directory information.
All Samsung handsets are fully hearing aid compatible.
Conventional Telephones
Any industry-approved single line telephone using one pair (two wire) tip and ring circuitry may be
connected to a single line station port in the system. The ringer equivalency of any such phone must
not exceed 1 or damage to the system may result.
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