AM-64/128A
Baseband Modems

Brochure

Designed to meet the demanding criteria of Communications markets worldwide is the ATL range of xDSL baseband modems. The AM-Series offers reliable data transfer for the last mile of your data network. Full duplex transmission is provided over a 2- wire copper twisted pair using AMI (full width pulse shaping) and echo cancellation transmission techniques, delivering improved noise immunity. Ideally suited to driving data between computers, high-speed multiplexers, X.25 nodes or LAN bridges and peripheral devices, ATL's baseband modems can be used to drive data between any two locations that require high-speed data transfer. In addition it is possible to tail-end digital services through the use of the external clocking facility. The AM-Series applications include complete access system provisioning, when used with the AM-70-MAX multiplexer family, allowing grooming of up to 85 64kbps circuits from one multiplexer shelf.

The range of operation is dependent upon the transmission line rate, any bridged taps present and the cable gauge. This range can be achieved over any mix of cable gauges normally encountered in a local telephone network. The limiting attenuation range is 50dB.

AM-64/128 modems

High-density shelf accommodating up to 12 cards is available. Card and standalone modems are functionally equivalent. An LCD and menu driven software are used for setting loops, configuration and providing status displays. Front panel LEDs indicates Fault, Test and Data transmission Status. A communications channel is included in the line signal structure allowing both ends of a circuit to be configured from one modem.

AM-64/128A provides data interfaces at the rear via a wide range of plug in modules. Line cables can be provided to suit local markets. Asynchronous working to 19.2kbps is supported. For rackmount modems, an intermediate proprietary interface is presented to the backplane of the host shelf. Separate connector/cables assemblies map from the backplane to the required DCE interface (i.e. X.21, V.24, V.35, analogue etc).

High Density Shelves

Two Rack versions are available - AM-Chassis and AM-Managed Chassis. Both are 6VU high 19" rack mounting according to DIN 41494 and accommodate a maximum of 12 modems from the AM—Series. There is no restriction on the mix of interface types or modems in a shelf. Shelves can be powered by either 230V; 120V AC mains or a 48V DC power supply unit.

AM- Chassis

The basic version of the Shelf comes complete with a high reliability Power Supply and an LCD Display Unit. System configuration and testing is performed via the shelf LCD display unit and menu selection buttons. Individual modem configuration is selected by pressing the display select key on the front of the modem. The AM-Chassis supports single pair working. AM-Managed Chassis This Shelf allows more comprehensive system management, via a Controller Module or Network Element. System configuration of cards and circuits is via the Menu buttons, a Windows - based GUI or ANMP (a platform independent SNMP software package).

The shelf comes complete with power supply and VT100 or Ethernet controller modules. Rackmount modems are front loading with cable termination at the rear.

^ Back to top ^