IRT, 2.048 Mb/s (E1) G.703 Data Distribution Amplifier



* Ex GST. Check with us for the latest pricing

- Data regeneration with Jitter Attenuator
- Front panel monitoring facility
- Protection switching facility
- External alarms and bypass
- Redundant pair operation capability
- Simple Network Management Protocol (SNMP) monitoring
- Compatible with other IRT Eurocard modules and frames

The DDA-4280 data distribution amplifier is intended for use with E1 data signals conforming to the ITU Rec. G.703. The DDA-4280 is primarily intended for use in pairs with a double width rear assembly for automatic path protection applications, although it is supplied as standard with its own rear assembly for stand-alone applications.

Four outputs are provided at the rear of the module with an additional output for monitoring purposes on the front panel. One output (O/P 1) is controlled by relays to provide a bypass signal from the input in the event of a power failure.

Indicators are provided on the front panel for:
- Data loss
- AIS detect
- Module in service (Main)
- Module in standby

Changeover inhibit and changeover request switches are provided on the front panel for use where modules are linked in pairs for redundancy. For this configuration the double width rear assembly is needed to link the logic sections of two modules.

When used as a distribution amplifier the DDA may be housed in any of IRT's standard Eurocard frames. When used in pairs for handshake operation only 3 RU chassis types may be used so that the double width rear assembly may be used.

The DDA-4280 is also equipped with Simple Network Management Protocol (SNMP) monitoring so that status and alarms can be remotely monitored and controlled via an Ethernet connection. This function is only available when the unit is housed in an IRT 4000 series frame fitted with an SNMP agent module.

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Syd: 02 8213 0200  Mel: 03 8691 5210 Qld: 07 3607 3785 WA/SA/NT: 08 8120 3203

New Zealand:
Akl: 09 271 4000 Wel:  04 499 3888

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