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Comarra's new compact (weight < 1 kg),
robust and cost effective, E1 echo canceller solution in a
desk top version (modem type). Echo cancellation on each
channel is 64ms. / 128ms. Bi-Directional / Uni-Directional
- user selectable. |
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Comarra offers echo cancellation
and voice quality enhancement solutions for the following
network situations:
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- Wireline
- International Gateway
- Wireless
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The echo cancellers is an ideal
solution for long distance telephony, GSM, CDMA, TDMA, VoIP,
satellite and radio communication applications.
The VCL-EC, E1 echo
canceller desk top version (modem type) is offered to 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 solutions offers carrier-grade voice quality per AT&T
Voice Quality Assessment Lab.
Type of
E1 Echo Canceller offered - desk top (modem type) version
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
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.
E1 Echo
Canceller - Highlights
- Compact E1 echo canceller desk
top version (modem type) - weight < 1 kg.
- 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 function.
- Carrier-grade voice quality
per AT&T Voice Quality Assessment Lab.
- 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
- 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:
Pass Through: Signaling protocols supported:
-
30B+D PRI ISDN (Euro ISDN)
signaling,
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31B (31 voice channels) with
out-of-band signaling,
-
R2 CAS Signaling,
-
SS7 signaling (on any user
selected time-slot).
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All signaling options are User
Selectable / User Programmable. Allows digital data
transmission on user-selected time-slots.
Management and Control
- Local access through COM port
(RS232 serial port)
Applications for the E1 Echo Cancellers
Datacomm Applications
- Voice Over Frame Relay
- Voice Over ATM
- Voice Over Internet / LAN
Central
Office and PBX Applications
Voice Over ATM Applications
Satellite Communications Applications
- Digital Circuit Multiplication
Equipment (DCME)
Wireless Applications
Voice Over Frame Relay, ATM Applications
Others Links:
VoIP SS7 and C7 Solution
Quintum Tenor VOIP Gateways
E1 VOIP-GSM Gateway
GSM Gateways / GSM Channel Banks
Echo Cancellers
Digital Access Cross Connect Switch (DACS)
Groomers (Hi-Z Non-Instrusive Monitoring)
Multiplexers
Technical specifications are subject to change without
notice.
All brand names and trademarks are the property of their respective owners.
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