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Valiant's E1, T1 and DS3 Echo Canceller and Voice Quality Enhancement solutions
 
 
 
 
 
 
E1, T1 and DS3 Echo Cancellers and Voice Quality Enhancement (VQE) Solutions

Valiant offers a wide range of echo cancellation and voice quality enhancement (VQE)  solutions for the following network situations:
  • Wireline, International Gateway, Wireless, Satellite and IP Gateways
  • Long distance telephony, GSM, CDMA, TDMA, VoIP, satellite and radio communication applications
  • E1 SignalingSupport: The E1 echo cancellers supports the following signaling protocols:
    • 30B+D PRI ISDN (Euro ISDN) signaling,
    • 31B (31 voice channels) with out-of-band signaling,
    • R2 CAS Signaling,
    • SS7, C7 signaling (on any user selected time-slot).
    • C5, CCS, Q50 (AB/CD),
    • All signaling options are User Selectable / User Configurable.
  • T1 Signaling Support: The T1 echo cancellers supports the following signaling protocols supported:
    • 24B (24 Voice Channels) with out-of-band signaling (C7 / SS7 Signaling on any user selected time-slot)
    • 23B+D, PRI ISDN (23 Voice Channels + D Signaling Channel),
    • D4 Robbed Bit Signaling,
    • CCS (C6, C7),
    • RBS (E&M, PLR, FXS-GS, FXO-GS, FXS-LS, FXO-LS)
    • All signaling options are User Selectable / User Configurable.

The echo canceller equipment is compliant to ITU-T G.164, G.165, G.168 (2000 / 2002) requirements for echo cancellation. The echo canceller supports fax / modem G.164 and G.165 (2100 Hz) tone disable function

Type of Echo Cancellers offered
 

Products
E1, T1 and DS3 Echo Canceller and Voice Quality Enhancement (VQE) solutions
E1 Echo Canceller (1 x E1) E1 (1 x E1) Echo Canceller in 1U high, 19 Inch Rack mount shelf, with telnet. 64ms Bi-Directional / 128ms. Uni-Directional - user selectable. Data Sheet (PDF)
E1 Echo Cancellers (10 x E1) E1 (10 x E1s) Echo Cancellers in 3U high, 19 Inch Rack mount shelf, with telnet. 64ms Bi-Directional / 128ms. Uni-Directional - user selectable. Data Sheet (PDF)
E1 Echo Cancellers (upto 32 E1s) E1 (upto 32 E1s) in 6U high, 19 Inch Rack mount shelf. Echo cancellation on each channel is 64ms. bi-directional / 128ms. uni-directional Data Sheet (PDF)
E1 Echo Cancellers with Voice Quality Enhancement (VQE) 128ms Bi-Directional compact 8 x E1 Echo Canceller with Voice Quality Enhancement (VQE) features in a 19-inch, 1U (44mm height) chassis, with echo-tail programmable from 0ms. to 896ms. Cancel echo at near-end and far-end with single installation. Data Sheet (PDF)
T1 Echo Canceller (1 x T1) T1 (1 x T1) Echo Canceller in 1U high, 19 Inch Rack mount shelf, with telnet. 64ms Bi-Directional / 128ms. Uni-Directional - user selectable. Data Sheet (PDF)
T1 Echo Canceller (10 x T1) T1 (10 x T1) Echo Cancellers in 3U high, 19 Inch Rack mount shelf, with telnet. 64ms Bi-Directional / 128ms. Uni-Directional - user selectable. Data Sheet (PDF)
T1 Echo Cancellers (upto 32 T1s) T1 (upto 32 T1s) in 6U high, 19 Inch Rack mount shelf. Echo cancellation on each channel is 64ms. bi-directional / 128ms. uni-directional Data Sheet (PDF)
T1 Echo Cancellers with Voice Quality Enhancement (VQE) 128ms Bi-Directional compact 8 x E1 Echo Canceller with Voice Quality Enhancement (VQE) features in a 19-inch, 1U (44mm height) chassis, with echo-tail programmable from 0ms. to 896ms. Cancel echo at near-end and far-end with single installation. Data Sheet (PDF)
DS3 Echo Cancellers with Voice Quality Enhancement (VQE) Industry's most compact DS3 Echo Canceller and Voice Quality Enhancement (VQE) solution with echo tail  programmable feature from 0 ms. to 896 ms. Echo cancellation on each channel is 128 ms. Bi-directional (near-end and far-end) echo cancellation. Data Sheet (PDF)
 

Echo Cancellers - Highlights

  • Meets ITU-T G.164, G.165, G.168 (2000 / 2002) requirements for echo cancellation.
  • E1 Signaling protocols supported: The E1 echo cancellers supports the following signaling protocols:
    • 30B+D PRI ISDN (Euro ISDN) signaling,
    • 31B (31 voice channels) with out-of-band signaling,
    • R2 CAS Signaling,
    • SS7 signaling (on any user selected time-slot).
    • All signaling options are User Selectable / User Configurable.
  • T1 Signaling Support: The T1 echo cancellers supports the following signaling protocols supported:
    • 24B (24 Voice Channels) with out-of-band signaling (C7 / SS7 Signaling on any user selected time-slot)
    • 23B+D, PRI ISDN (23 Voice Channels+D Signaling Channel),
    • D4 Robbed Bit Signaling,
    • CCS (C6, C7), RBS (E&M, PLR, FXS-GS, FXO-GS, FXS-LS, FXO-LS)
    • All signaling options are User Selectable / User Configurable.
  • Allows digital data transmission on user-selected time-slots
  • The echo canceller supports fax / modem G.164 and G.165 (2100 Hz) tone disable.
  • Echo-tail displacement feature from 0ms. to 896ms. (available in 8 port echo canceller version)
  • Carrier-grade voice quality per AT&T Voice Quality Assessment Lab.
  • Remote access through telnet over LAN / TCP-IP link (10/100BaseT)
  • Local access through COM port (RS232 serial port)
  • Easy to use text based CLI commands for management and configuration
  • Adjustable gain/loss settings on all channels. Provides the user the flexibility to adjust and optimize the voice,  transmit and receive levels
  • Non-Linear Processor with Comfort Noise Insertion
  • Redundant Power Supply (Optional)
  • E1 link by-pass on power failure. This feature helps to maintain the link integrity even in the event of power failure
  • Automatic E1 link by-pass upon removal of power supply
  • Option for user to select voice echo cancellation or digital-data transmission selectively on each time-slot for selective echo cancellation. This feature allows the user to use selected time-slots for data transmission to enable digital data / CCS signaling transmission
  • Transmission (data mode), while keeping the echo cancellation "ON" on the remaining time-slots (voice mode), on which echo is required to be cancelled
  • Ensure echo canceller maintains excellent performance at all times in presence of tones or signals including DTMF tones
  • Instability detector suppresses variable pitched ringing or oscillation.
  • Path change detect permits fast re-convergence when a major change occurs in the echo channel.

  • Usable in telecommunications systems worldwide.

Voice Quality
  • Acoustic Echo Control (AEC)
  • Adaptive Noise Reduction (ANR)
  • Automatic Level Control (ALC)
  • Adaptive Listner Enhancement (ALE)

Fault Recovery

The echo canceller equipment offers fault recovery feature. It offers automatic by-pass upon power-supply failure / removal power supply. (i.e. it offers E1/T1 circuit by-pass in the event of power supply failure).

Remote Monitoring and Control

  • Remote access through telnet over LAN / TCP-IP link (10/100BaseT)
  • Local access through COM port (RS232 serial port)

Applications for the E1 Echo Cancellers

  • Wireless: GSM, CDMA, TDMA, PCS, and Cellular Base Stations.
  • Digital Circuit Multiplication Equipment (DCME) : Satellite Communications and Multiplexers.
  • PCS, cellular, mobile, and digital cordless wireless systems.
  • PBX and central office systems.
  • Datacomm: Voice Over Frame Relay, Voice Over ATM, and Voice Over Internet.
  • Voice over ATM, Frame Relay or packet switching systems and fax transmissions.
  • Central Office and PBX: Network Trunks, Echo Canceller Pool, Common Equipment and Audio Conferencing Bridges
  • Voice over datacomm including voice over Internet (VoIP), voice over ATM (VoATM), and voice over Frame Relay (VoFR).
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