E1 Echo Cancellers
1U, 19 Inch Version

Features and Highlights

• Compact E1 echo canceller solution in 19 inch, 1U high (44mm height) chassis and accommodates 1, E1 echo canceller with telnet, per shelf.
• 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.
• 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 30-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 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)

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.