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Valiant Communications: E1 Echo Canceller - Shelf Front View
 
 
 
 
 
 
E1 Echo Cancellers - Front View of the Shelf

Description

VCL-EC, E1 Voice Echo Canceller is a fully integrated 30 channel echo canceller that cancels echo up to 64ms. / 128ms - User Selectable. Each of the 30 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. E1 Inputs and E1 Outputs are 120 Ohms, RJ45. T1 echo cancellers are also offered and available.

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

  • E1/T1 echo canceller - desk top (modem type version)
  • 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 E1 Echo Canceller offered - upto 10 E1 Cancellers per 19 inch 3U High Chassis

E1 echo canceller: 64ms Bi-directional and 128ms. Uni-Directional - User Selectable. Our E1 echo canceller is a fully integrated 30 channel echo canceller that cancels echo up to 64ms. bi-directional / 128ms. uni-directional - user selectable. E1 Inputs and Outputs are balanced 120 Ohms, RJ-45

VCL-EC, E1 Voice Echo Canceller: Shelf Description

The VCL-EC, E1 Voice Echo Canceller is a 3U, 19 Inch Shelf, fitted with a backplane that provides rear access of all external interfaces. The E1 interface, power input, alarm extension are all accessed from the system backplane.
 

Products

Front View

Front View of the E1, 128ms. Echo Canceller Equipment

 
Front View (Left to Right) Card Details    Part No.
Slot 1 PS, Power Supply Card          VCL-LD-110
Slot 2 to Slot 11 EC, Echo Canceller Card          
(64ms. b-directional / 128ms. uni-directional) - User Selectable
VCL-EC
Slot 12 GUI Access Card VCL-EC128-NMS
 
Rack Mounting Standard 19 Inch. DIN Rack
Height 133.33mm.
Depth 292mm.
Width      482mm.
Weight                7.50 Kg. (10, Echo Cancellers)

E1 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:
    • 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 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
  • 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
  • Fully integrated independent 30-channel voice echo canceller

Signaling Support

The E1 echo cancellers supports the following signaling protocols: Signaling protocols supported: 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 Programmable. Allows digital data transmission on user-selected time-slots.

Fault Recovery

The echo canceller equipment offers fault recovery feature. It offers automatic by-pass upon power-supply failure (i.e. it offers E1 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)

Redundancy

The echo canceller is equipped to offer redundant power supply (optional).

Unique E1 Echo Canceller Features

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 E1 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 E1 connections on the echo-canceller card.

USER PROGRAMMABLE SIGNALING OPTION: The E1 echo cancellers supports the following signaling protocols: Signaling protocols supported: 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 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 E1 echo canceller supports 2100 Hz fax / analog data modem tone detection and echo canceller disabling on all channels.

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 (VTOA) and voice over Frame Relay (VoFR).

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