APX HSSI UNI Interface Module

The APX UNI interface modules enable connection to ATM services, either as network or switch ports, or are used as trunk ports for non-ATM applications. Each UNI modules provide a single ATM interface port, with the range being standards compliant and covering all standard Telecom data rates.

The APX HSSI UNI module offers a HSSI serial port supporting native ATM cells, which can operate asymmetrically at up to 110Mbps. This module allows the AP to connect with other ATM equipment via a HSSI circuit (e.g. a satellite link, or an encrypted serial link). This module offers a HSSI DTE interface which can connect directly to a HSSI satellite modem or a HSSI encrypter, thereby offering a flexible bandwidth ATM over serial service.

Each UNI module performs physical layer and ATM layer functions including framing, alarm processing and cell delineation. Flexible clocking options remove network synchronisation problems. Status LED's are provided to indicate that real traffic is passing across the ATM interface (e.g. ATM over satellite).

Management and configuration of this module is achieved via the simple menu driven user interface. Extensive statistics and status information are gathered at all layers and are available to the user interface as a diagnostic aid. OAM alarm and loopback functions are supported as per UNI 3.1

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 HSSI DTE interface
• operates asymmetrically at up to 110Mbps in each direction
  
• can be used in any AP chassis
• hot swap interface module, with configuration automatically loaded onto the replacement module

Applications supported:

• ATM over satellite (including asymmetric services)
  
• ATM over serial (including encrypted links)