Metrodata Limited

The APX ASI CE Interface Module enables ASI interfaced non-ATM equipment, such as video codecs or satellite modems, to be converged with other services using the AP multi-service platform.

This ASI CE module offers a protocol transparent, point to point connection to another ASI CE module across an ATM network, leased line or transparent circuit (e.g. a satellite link).

This module performs adaptation of the incoming bit stream using unstructured AAL.1 to segment it into ATM cells. These ATM cells are transported across the AP infrastructure to the far end equipment. The far end AP, recovers the ATM cell stream, and from this re-assembles the ASI bit stream, again using unstructured AAL.1. End to end timing is automatically maintained through the use of adaptive clocking and jitter attenuation.

This module operates transparently to payload data supporting MPEG data as well as encrypted data. Transport stream rates from 600kbps to 52Mbps are supported. Only a single transport stream is supported per interface module, with PID based multiplexed streams not supported. To support asymmetric operation the receive clock is configurable between 600kbps and 52Mbps. The receive clock will adapt to within 100ppm of the nominal clock selection. Clocks are programmable to 1bps granularity.

Management and configuration of this module is achieved via the simple menu driven user interface. Extensive statistics and status information are available to the user interface as a diagnostic aid. Additionally SNMP Traps may be generated to indicate Link Up/Down. These modules can be "Hot Swapped" to ease maintenance, with replacement modules recovering immediately without further configuration.

This module has the following features:

• standards compliant ASI interface
• asymmetric operation at up to 52Mbps
• can be used in any AP chassis
• hot swap interface module, with configuration automatically loaded onto the replacement module