ATL Telecom AM2048 - Manual (Page 6)

8 ATL TELECOM USER GUIDE
AM2048A ATL TELECOM USER GUIDE
AM2048A
9
The modems provide synchronous communications at user data rates between 64kbps and
2048kbps over one or two twisted pair cables. 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 rack mount units are AM2048B. This manual covers the desktop
units.
The standard version of AM2048 uses G.SHDSL TC-PAM line code. In special circumstances,
they may be suplied with 2B1Q or CAP line codes. The modem may be modified from one line
code to the other by software download.
The customer interface is provided via interchangeable plug-in modules. Separate interface
modules can be purchased in order to modify the units for operation with a different customer
interface at a later date.
The standard version comes with two transmission pairs equipped and may be configured to
operate using one or two pairs. A more economical single pair version is also available for
applications where the flexibility of two pairs isn’t necessary.
The AM2048 is available as a mains powered (85-250Vac) version , or a DC (-48Vdc) version
that can also be line powered.
The AM2048 can be easily configured via a VT100 dumb terminal or via the front panel
controls. For VT100 configuration, it is recommended to use a VT100 terminal emulation
program running on a notebook or palmtop PC (see FAQs for details about obtaining a VT100
emulator program). Using the menu system with on-line help should reduce the need to refer
to the handbook. The VT100 Management User Guide gives a full description of the menu
system.
Once configured, the operation of the AM2048 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.
Modifications to line cords and power supply leads are available for country specific
requirements. In such cases, the line cord pin-out may be different.
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