Chapter 1: Introduction; General Description - Nortel M5208 Manual

Chapter 1
Introduction

General description

The M5208 Meridian Business Set is designed for direct connection (through
a non-loaded subscriber loop pair) to the Northern Telecom DMS–10, DMS–
100, DMS–250, or Meridian SL–100 Digital Switching systems.
The M5208 is loop powered and works with a maximum loop length of
4,572 m (15,000 ft) of 26 AWG standard twisted pair telephone wires,
subject to Line Engineering Rules, NTP 297–2011–180.
The service provided by the M5208 substitutes low-level signals over a half-
duplex, above-voice band (8 kHz) signalling channel for the traditional loop
signalling (dial pulse) or inband tone signalling (DTMF tones) on a
conventional subscriber loop. In addition to signalling and supervision,
messages on the above-voice band signalling channel include signals for
implementing the many special features available on the M5208, as well as
display characters.
The M5208 offers a choice of selected key and system features—it has 3
fixed keys, a dial pad consisting of 12 fixed keys, 8 programmable feature
and/or directory number keys with LCD indicators, and is equipped with a
speaker for alerting tones, on-hook dialing and intercom.
The alphanumeric display module is mounted at the rear top edge of the
telephone and is hinged so that the viewing angle can be adjusted physically
to reduce glare and maximize the contrast. The maximum display capacity
of the display screen is 2 rows of 24 characters each.
297–2011–213 02.01 Standard February 1999
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