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T1 Quad Echo Canceller
Upto 32 T1 Echo Cancellers per Shelf / Chassis

Product Overview

Orion Telecom Networks Inc. provides robust and cost effective T1 and E1 Quad Echo Canceller for the long distance, wireline, wireless, (GSM, CDMA), VoIP, satellite and radio communications.



 

The Quad VCL-EC, T1 Echo Canceller card offers 4 x T1 Echo Cancellers in each card which provide cancellation of 64ms / 128ms (user selectable) echo tails. The Echo Canceller equipment is compliant to ITU-T G.164, G.165, G.168 (2000 / 2002) requirements for echo cancellation.

The Echo Canceller solution offers carrier-grade voice quality per AT&T Voice Quality Assessment Lab. The Echo Canceller supports fax / modem G.164 and G.165 (2100 Hz) tone disable function.

Signaling

The T1 Echo Cancellers support 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).
  • Robbed Bit Signaling.
  • All signaling options are USER SELECTABLE / USER CONFIGURABLE.

Redundancy

The Echo Canceller is equipped to offer redundant power supply (optional)

Remote monitoring and control

The equipment offers RS232 serial interface for configuration through a PC COM Port and an Ethernet (10BaseT) interface for remote LAN configuration and monitoring which allows the user to monitor and configure the equipment over a TCP-IP network, from anywhere in the world over a TCP / IP network.

Types of T1 Echo Cancellers offered
User Selectable:

  • 128ms - Unidirectional (cancels the echo with upto 128ms. tail at the far end).

  • 64ms - Bidirectional (cancels the echo with upto 64ms. tail in both directions).

Quad T1 VCL-ECTM Voice Echo Canceller - Technical Highlights

  • Provides voice echo cancellation of up to 64ms. Bidirectional / 128ms. Unidirectional - User Selectable / User Programmable.

  • Meets ITU-T G.168 (2000 / 2002) requirements for echo cancellation.

  • 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). Robbed Bit Signaling. All signaling options are USER SELECTABLE / USER CONFIGURABLE.

  • The Echo Canceller supports fax / modem G.164 and G.165 (2100 Hz) tone disable

  • Offers RS232 serial interface for external PC COM Port and Ethernet (10Base-T) interface for remote LAN

  • Non-Linear Processor with Comfort Noise Insertion

  • Automatic by-pass upon power supply failure / removal of power supply
    Redundant Power Supply (Optional)

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 T1 circuit by-pass in the event of power supply failure).

Applications for the Quad T1 VCL-EC

Datacomm Applications

  • Voice over Frame Relay

  • Voice over ATM

  • Voice over Internet/LAN (VoIP)

Central Office and PBX Applications

  • Network Trunks.

  • Echo Canceller Pool.

  • Common Equipment.

  • Audio Conferencing Bridges

Voice Over ATM Applications

  • A multi-channel echo canceller resource or pool is shared among many channels to reduce cost.

  • Echo cancellation is done at a DS0 level.

Satellite Communications Applications

  • Digital Circuit Multiplication Equipment (DCME)

Wireless Applications

  • Digital Cordless and Cellular Basestations.

  • GSM, CDMA.

  • Access Controllers.

Voice Over Frame Relay, ATM Applications

  • Frame Relay and ATM routers and switches introduce large, variable and unpredictable delays.

  • Echoes from the Public Switched Telephone Network (PSTN) in combination with the delays from Frame Relay and ATM equipment yield objectionable speech quality.

Quad T1 VCL-EC, T1 Echo Canceller Advantages

USER PROGRAMMABLE tail-side. Echo cancellers are always required to be installed, such that, the tail-side of the echo canceller always faces towards the source of the echo. Our T1 Echo Cancellers have a USER CONFIGURABLE tail-side so that the user may remotely change the direction of the tail-side of the echo canceller - without having to physically change the T1 connections on the echo canceller card.

USER PROGRAMMABLE Signaling Option. Our echo cancellers provide USER PROGRAMMABLE T1 signaling options . The T1 signaling protocols that we support are 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). Robbed Bit Signaling. All signaling options are USER SELECTABLE / USER CONFIGURABLE.

Quad T1 VCL-EC, T1 Echo Cancellers Support 2100 Hz fax / analog data modem tone detection and echo canceller disabling on all channels. For dedicated digital data or video channels, if you wish to assign certain specific times-slots of the T1 circuit for dedicated video you may do so, using our T1 Echo Cancellers. Our T1 Echo Cancellers allow the USER to PROGRAM / ASSIGN dedicated time-slots for digital data or video transmission. The user may specify / define the dedicated data channels so that they are always bypassed from the echo cancellation circuitry - leaving those dedicated time-slots for digital data communication / dedicated video transmission only.

USER PROGRAMMABLE dedicated data channels. The user may specify / define the dedicated data channels so that they are always and completely bypassed from the echo cancellation circuitry - leaving those specifically assigned dedicated time-slots for digital data transmission (including video transmission).

Features and Highlights

  • User Selectable - 128ms - Unidirectional or 64ms - Bidirectional. The user selection is made through a user configurable software interface command.

  • Compliant to ITU-T G.164, G.165, G.168 2000, G.168 2002) requirements.

  • Carrier-grade voice quality per AT&T Voice Quality Assessment Lab.

  • Fax / Modem G.164, G.165 - 2100 Hz tone disable as per ITU-T G.164/G.165 Recommendations. Allows fax and analog modem data transmission through automatic echo cancellation enable / disable function.

  • Disable Tone detection supported on all audio paths.

  • Fully integrated independent 24-channel voice echo canceller

  • Option for user to select data or voice channels 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.

  • T1 Circuit by-pass in event of power supply failure. This feature enables the by-pass of the T1 Circuit in the event of power failure. This ensure continues signal even if the power to the echo canceller fails.

  • T1 Circuit by-pass on power failure.

  • T1 Circuit by-pass on Echo Canceller card removed. This feature allows the user to by-pass the T1 Circuit by simply removing the echo canceller card.

  • T1 circuit connects "through" as soon as echo canceller is removed from its slot.

  • Non-Linear Processor with adaptive suppression threshold and comfort noise insertion

  • Programmable Double-Talk detection threshold.

  • Narrow-Band signal detection.

  • Adjustable Gain/loss settings on all channels. Provides the user the flexibility to adjust and optimize the voice and transmit receive levels.

  • Path change detect permits fast re-convergence when a major change occurs in the echo channel.

  • Signaling Support:

    • 24B (24 Voice Channels) with out-of-band signaling

    • C7, SS7 Signaling

    • 3B+D, PRI ISDN (23 Voice Channels+D Signaling Channel)

    • Robbed Bit Signaling (on any user selected time-slot)

    • All signaling options are USER SELECTABLE / USER CONFIGURABLE.

  • Redundant Power Supply (Optional)

  • Non-Linear Processor with Comfort Noise Insertion

  • TCP / IP remote access for remote configuration and control.

  • Assures operability with V.32 / V.32bis / V.34 modem and fax transmissions. Conforms to standards assuring proper public network operation and facilitating system integration.

  • Removes residual echo and minimizes switching effects thereby providing high perceived speech quality. Unique design provides the industry's best sounding single chip echo canceller.

  • Ensure echo canceller maintains excellent performance at all times in the presence of non-echo voice signals. Useful for trunks that have very low echo-returns loss.

  • 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.

  • User selectable tail-end side. This feature allows the user to select the "Tail-End" side of the Echo Canceller. The "Tail-End" side of Echo Canceller is that part of the network which generates / causes to generate the Echo. Unidirectional Echo Cancellers must always be installed on far-end of any network from the point at which an Echo is being heard. The "Tail-End" side must always face the "Source Side" of the network which is generating the echo. Ideally suited to handle most echo situations.

  • Usable in telecommunications systems worldwide. Able to interface in most systems where linear samples are available.

Shelf Description

The Quad T1 VCL-EC, T1 Voice Echo Canceller, 32 per Shelf / Chassis, fitted with a backplane that provides rear access of all external interfaces. The T1 interface, power input, alarm extension are all accessed from the system backplane.

Front View of the Shelf

Application Diagrams

Others Links

Technical specifications are subject to change without notice.
All brand names and trademarks are the property of their respective owners.

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T1 Quad Echo Canceller - Data Sheet (PDF)
T1 Quad Echo Canceller - Technical Specifications
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::   Application Diagram  ::
 
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Orion Telecom Networks, Inc.
16810, Avenue of the Fountains,
Suite # 108, Fountain Hills, AZ 85268 U.S.A.
Phone: +1 480-816-8672,  Fax: +1 480-816-0115
E-mail: sales@oriontelecom.com
Web Site: http://www.oriontelecom.com