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Bhumika
provides robust and cost effective DS3 echo canceller and voice
quality enhancement solutions for the long distance, wireline,
wireless, (GSM, CDMA, TDMA), VoIP, satellite and radio
communications. The VCL-EC, DS3 echo cancellers are offered to
provide cancellation of upto 128ms 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. The echo canceller supports fax /
modem G.164 and G.165 (2100 Hz) tone disable function.
Bhumika offers echo cancellation
and voice quality enhancement solutions for the following
network situations:
- Wireline
- Wireless
- Satellite
- International Gateway
- IP Gateway
Signaling protocols
supported
are:
24B (24 Voice
Channels) with out-of-band signaling (C7 / SS7 Signaling on
any user selected time-slot).
23B+D,PRI ISDN
(23 Voice Channels+D Signaling Channel).
D4, Robbed Bit
Signaling
All
signaling options are User Selectable
Allows digital data
transmission on user-selected time-slots.
Built-in cross-connect at DS-0 level. Allows user to
cross-connect DS-0 to any DS-0 and by-pass all signaling,
digital data and video channels.
Type of
Echo Canceller offered: DS3 Echo canceller
VCL-EC, DS3 echo
cancellers are offered to provide cancellation of upto 128ms
echo tails. The echo canceller equipment is compliant to ITU-T
G.164, G.165, G.168 (2000 / 2002) requirements for echo
cancellation.
DS3 Echo
Canceller - Features and 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.
- 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.
- User
Selectable - 128ms - Uni-directional echo canceller with
Programable off-set. Allows echo canceller deployment at the
local end.
- Carrier-grade
voice quality per AT&T Voice Quality Assessment Lab.
- Fax / Modem
G.164, G.165 - 2100 Hz tone disable as per ITU-T G.164/G.165
Recommendations.
- Allows fax and
analog modem data transmission through automatic
echo-cancellation enable / disable function.
- Disable Tone
detection supported on all audio paths.
- Fully
integrated independent 672-channel voice echo canceller.
- Option for
user to select data or voice channels for selective echo
cancellation. This feature allows the user to use selected
time-slots for data transmission to enable digital data / CCS
signaling transmission.
- Data
Transmission on select slots (data mode), while keeping the
echo cancellation "ON" on the remaining time-slots (voice
mode), on which echo is required to be cancelled.
- DS3 Circuit
by-pass in the event of power supply failure. This feature
enables the by-pass of the DS3 Circuit in the event of power
failure. This ensure continued service even if the power to
the echo-canceller fails.
- Programmable
Double-Talk detection threshold.
- Adjustable
gain/loss settings on all channels. Provides the user the
flexibility to adjust and optimize the voice and transmit
receive levels.
- Redundant
Power Supply (Optional)
- The equipment
offers RS232 serial interface for configuration through a PC
COM Port, and an Ethernet (10BaseT) interface for remote LAN
configuration and monitoring which allows the user to monitor
and configure the equipment over a TCP-IP network from
anywhere in the world.
- Removes
residual echo and minimizes switching effects thereby
providing high perceived speech quality.
- Ensure echo
canceller maintains excellent performance at all times in
presence of tones or signals including DTMF tones.
- Instability
detector suppresses variable pitched ringing or oscillation.
- Path change
detect permits fast re-convergence when a major change occurs
in the echo channel.
- Usable in
telecommunications systems worldwide.
- Built-in
cross-connect at DS-0 level. Allows user to cross-connect DS-0
to any DS-0 and by-pass all signaling, digital data and video
channels.
-
The echo canceller
equipment offers fault recovery feature. It offers automatic
by -pass upon power-supply failure / removal power supply.
(i.e. it offers T1 circuit by-pass in the event of power
supply failure).
Fault Recovery
DS3
Circuit is by-passed in the event of power supply failure. This
feature enables the by-pass of the DS3 Circuit in the event of
power failure. This ensure continued service even if the power
to the echo-canceller fails.
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 DS3
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 DS3 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 DS3 connections on the
echo-canceller card.
USER PROGRAMMABLE SIGNALING
OPTION: Our DS3 echo-cancellers provide User Programmable
DS3 signaling options whereby the user may use our DS3
echo-cancellers just as efficiently over a wide spectrum of DS3
signaling options. The DS3 signaling protocols that we support
are 24B (24 Voice Channels) with out-of-band signaling (C7 / SS7
Signaling on any user selected time-slot) 23B+D, PRI ISDN (23
Voice Channels+D Signaling Channel), Robbed Bit Signaling. 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 bu-passed'
from the echo-cancellation circuitry - leaving those
specifically assigned dedicated time-slots for digital data
transmission (including video transmission).
The DS3 echo canceller supports
2100 Hz fax / analog data modem tone detection and echo
canceller disabling on all channels.
Applications for the
DS3 Echo Cancellers
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