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Bhumika offers echo cancellation
and voice quality enhancement solutions for the following
network situations:
- Wireline
- International Gateway
- Wireless
- Satellite
- IP Gateway
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
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: 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.
Management and Control
- 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.
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 Echo Cancellers Solutions:
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