T1 Echo Cancellers

Front View of the Shelf

T1 Echo Cancellers - Front View of the Shelf

Description

VCL-EC, T1 Voice Echo Canceller is a fully integrated 24 channel echo canceller that cancels echo up to 64ms. / 128ms - User Selectable. Each of the 24 channels cancel echo up to 64 / 128ms with disable tone detection and meets ITU-T G.165 and ITU-T G.168 requirements for echo cancellation. T1 Inputs and T1 Outputs are 100 Ohms, RJ45

E1 echo canceller are also offered and available

We offer the following E1 / T1 / DS3 echo canceller solutions.

  • E1/T1 echo canceller - 19 inch rack 1U version with telnet
  • E1/T1 echo canceller - 19 inch rack 3U version (10 echo cancellers per shelf)
  • E1/T1 echo canceller - 19 inch rack 6U version HIGH-DENSITY (32, echo cancellers per shelf)
  • DS3 echo cancellers

Type of T1 Echo Canceller offered - upto 10 E1 Cancellers per 19 inch 3U High Chassis

T1 echo canceller: 64ms Bi-directional and 128ms. Uni-Directional - User Selectable. Our T1 echo canceller is a fully integrated 24 channel echo canceller that cancels echo up to 64ms. bi-directional / 128ms. uni-directional - user selectable. T1 Inputs and Outputs are balanced 100 Ohms, RJ-45.

VCL-EC, T1 Voice Echo Canceller: Shelf Description

The VCL-EC, T1 Voice Echo Canceller is a 3U, 19 Inch Shelf, 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.

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Features and Highlights

T1 Echo Canceller - Highlights

  • Provides voice echo cancellation of up to 64ms Bi-Directional / 128ms Uni-Directional - User Selectable / User Programmable.
  • Meets ITU-T G.164, G.165, 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),
    • 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 Programmable.
  • Allows digital data transmission on user-selected time-slots.
  • The echo canceller supports fax / modem G.164 and G.165 (2100 Hz) tone disable.
  • 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.
  • E1 link by-pass on power failure. This feature helps to maintain the link integrity even in the event of power failure.
  • 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.
  • Fully integrated independent 24-channel voice echo canceller.

Fault Recovery

The echo canceller equipment offers fault recovery feature. It offers automatic by-pass upon power-supply failure (i.e. it offers 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)

Unique T1 Echo Canceller Features:

USER PROGRAMMABLE TAIL DISPLACEMENT: User definable echo-tail displacement is selectable between 0ms. to 896ms. on the return-path. This feature allows the user to cancel echo-tails in BOTH directions (both near-end and far-end echo tails), even in most demanding conditions that are common on VoIP networks and satellite links.

USER PROGRAMMABLE SIGNALING OPTION: The T1 echo cancellers supports the following signaling protocols: 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 Programmable. Allows digital data transmission on user-selected time-slots.

USER PROGRAMMABLE DEDICATED DATA CHANNELS: The User my 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).

The T1 echo canceller supports 2100 Hz fax / analog data modem tone detection and echo canceller disabling on all channels.

Applications for the T1 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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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).

Data Sheet

Data Sheet (PDF)