ATL Telecom AM2048 - Manual (Page 7)

ascom
telecom USER GUIDE AM768A/AM2048A
7
Issue 8
1. Introduction
This manual applies to the High Speed DSL Systems, designed and manufactured by Ascom
Telecommunications Ltd in the U.K..
The modems provide synchronous communications at user data rates between 64kbps and 2048kbps
over up to three twisted pair cables or a single optical fibre. The equipment has modular transmission
and user interfaces, which allows the equipment to be configured to meet many different installation
requirements. Both rack and desktop versions of all units are available. Desktop units are AM2048A…
and rackmount units are AM2048B… This manual covers the desktop units.
The AM2048A OS provides full duplex transmission at 2.048Mbps over a single single-mode optical
fibre.
The AM2048A OM provides full duplex transmission at 2.048Mbps over a single multi-mode optical
fibre.
The AM2048A MP provides full duplex transmission at 2.048Mbps using 3 copper pairs. It can be
used in point to point or point to multipoint mode. The line code is 3B1O.
The AM2048A CAP provides full duplex transmission at 2.048Mbps using 1 or 2 copper pairs. It can
be used in point to point or point to multipoint mode. The line code is CAP.
The AM768A is a reduced cost unit, available with a single transmission module. This has most of the
functionality of the AM2048 but reduced payload bandwidth due to using one transmission line
instead of three. It is intended mainly for use in point to multipoint mode in conjunction with the
AM2048A MP or the AM2048B MP
Separate interface modules can also be purchased in order to modify the units for operation with a
different terminal interface at a later date.
Throughout the handbook, all types of unit are referred to as DSLU (Digital Subscriber Line Unit)
The DSLU can easily be configured via a dumb terminal. It is recommended to use a VT100 terminal
emulation program running on a notebook or palmtop PC. Using the menu system with on-line help
should reduce the need to refer to the handbook.
Once configured, the operation of the DSLU is totally automatic. In the event of line disturbances or
power failure, the data link is restored without operator intervention.
Chapter 4 (Installation) describes the basic set up procedure and this should be read prior to setting
up any link.
The VT100 Management User Guide gives a full description of the menu system..
Modifications to line cords and power supply leads are available for country specific requirements. In
such cases, the line cord pinout may be different. The basic model is the same, line cords and power
cords are separate plug in items.