IMACS Analog Bridge Card

Overview

Analog bridging is a feature which allows several analog voice band circuits to be combined (bridged) into a single analog voice band circuit. In the case of the IMACS application, each analog circuit is a DS0 channel carrying analog traffic from an access card port such as an  4 wire E&M, or 2 wire E&M. Although the traffic originates as an analog signal, it is bridged digitally after it has been digitized into a DS0. The bridge can also include trunked DS0 circuits originating from elsewhere, and conferenced together via inclusion of the WAN DS0 timeslot that carries the subscriber call. The Analog Bridge card currently supports only E&M services to deliver SCADA bridging requirements.

Like all other provisioning on the IMACS system, analog bridging is done via provisioning on the IMACS using the maintenance terminal interface. Once the bridge is set up, the circuits remain bridged until the provisioning is changed. There is no supervision (off hook/on hook) or signaling (dialing) involved and end-users cannot dynamically add or drop themselves from the bridge. In addition, voice compression is offered from an in-board compression engine running ADPCM  algorithms. The Analog Bridging Server card can also receive compressed voice path from another Analog Bridging Server card, or from the existing ADPCM server card. In summary, it is like a permanent telephone conference without the dynamic user control, which supports DS0 compression.

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Specifications

Key Features
  • 16 bridges, up to 30 DS0s per bridge.
  • Echo cancellation
  • Voice compression and decompression
  • Redundancy offered
  • SCADA applications
Dimensions
  • 8″ x 7.5″, 20cm x 18.75cm
Weight
  • .60 pounds, .27 kilograms

 

Power
  • 6.74 Watts, 23.0 BTU/hr
Interfaces
  • No physical interfaces, up to sixteen 30-port bridges
Standards
  • ITU-T G.726

Ordering Information

Model
Description
PRM-885070
IMACS, ANALOG BRIDGING SERVER CARD
8000-BRIDGE
IMACS 8000, ANALOG BRIDGING SERVER CARD