E1 Echo Canceller - 64ms. / 128ms. uni-directional echo canceller and bi-directional echo canceller supports PRI ISDN, Euro ISDN, SS7, C7 and R2 signaling.

Valiant's E1 Echo Canceller solutions with signaling support for PRI ISDN, Euro ISDN, SS7, C7 and R2 signaling.

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E1 Echo Canceller - upto 10 E1 Echo Cancellers per Chassis

Valiant offers a compact, robust and cost effective E1 echo canceller solution in 19 inch, 3U high chassis (accomodates up to 10, E1 echo cancellers per shelf). Echo cancellation on each channel is 64ms Bi-directional and 128ms. Uni-Directional echo tails - user selectable. T1 echo cancellers are also offered and available.

Valiant offers echo cancellation and voice quality enhancement solutions for the following network situations:

Wireline
Wireless
Satellite
International Gateway
IP Gateway

The echo canceller solutions are ideal for long distance telephony, GSM, CDMA, TDMA, VoIP, satellite and radio communication applications.

E1 Echo Canceller Data Sheet (PDF)
E1 Echo Canceller MS Power Point Presentation (PPS)
E1 Echo Canceller - Technical Specifications
E1 Echo Canceller - Front View
Application Diagrams
Also available T1 echo canceller solutions with PRI ISDN, SS7, C7, SLC-96 and D4 signaling (upto 10 T1 Cancellers per Chassis).

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

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 (VoATM), and voice over Frame Relay (VoFR).

Datacomm Applications

Voice Over Frame Relay
Voice Over ATM
Voice Over Internet / LAN

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

Satallite Communications Applications

Digital Circuit Multiplication Equipment (DCME)

Wireless Applications

GSM, CDMA, TDMA
Digital Cordless and Cellular Basestations

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.

Application Diagrams for the E1 Voice Echo Cancellers

Related Links

Echo Canceller solutions - Home Page

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Web Site: http://www.valiantcom.com