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Orion Telecom Networks Inc. provides robust and
cost effective E1 and T1 echo canceller and voice quality enhancement
solutions for the long distance, wireline, wireless, (GSM, CDMA, TDMA),
VoIP, satellite and radio communications. The VCL-EC, E1 echo
cancellers are offered to provide cancellation of 64ms bidirectional / 128ms
unidirectional (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.
We offer the following E1 /
T1 / DS3 echo canceller solutions.
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.
Signaling Support
The E1 echo cancellers
supports the following signaling protocols:
-
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)
-
All signaling options are
USER SELECTABLE / USER CONFIGURABLE.
Fault Recovery
The Echo Canceller equipment
offers fault recovery feature. It offers automatic by-pass upon
power-supply failure / removal power supply. (i.e. it offers E1 circuit
by-pass in the event of power supply failure).
E1 Echo Canceller - Highlights
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Provides
voice echo cancellation of up to 64ms Bidirectional / 128ms
Unidirectional - User Selectable / User Programmable
-
Meets ITU-T G.164, G.165, G.168 (2000/2002) requirements for echo cancellation.
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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
-
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
- Offers RS232 serial interface for external
PC COM Port and Ethernet (10Base-T) interface for remote LAN
- Adjustable Gain/loss settings on all
channels. Provides the user the flexibility to adjust and optimize the
voice and transmit receive levels
- Non-Linear Processor with Comfort Noise
Insertion
- Redundant Power Supply (Optional)
- E1 Circuit by-pass on power failure
- Automatic by-pass upon power supply
failure / removal of power supply
- 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
- 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
Types of E1 Echo
Cancellers offered:
64ms Bidirectional and 128ms. Unidirectional
E1 echo cancellers - User Selectable. Our E1 echo canceller is a fully
integrated 30 channel echo canceller that cancels echo up to 64ms.
bidirectional / 128ms. unidirectional - User Selectable. E1 Inputs and
Outputs are balanced 120 Ohms, RJ-45
Redundancy
The echo canceller is equipped
to offer redundant power supply (optional)
Remote Monitoring and Control
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.
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.
Our echo cancellers provide USER PROGRAMMABLE E1 signaling options whereby
the user may use our E1 echo cancellers just as efficiently over a wide
spectrum of E1 signaling options. The E1 signaling protocols that we support
are 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 dedicated data channels.
The user may 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. For dedicated digital data or video channels, if you wish to
assign certain specific times-slots of the E1 circuit for dedicated video
you may do so, using our E1 echo cancellers. Our E1 echo-cancellers allow
the USER to PROGRAM / ASSIGN dedicated time-slots for digital data or video
transmission. The user may specify / define the dedicated data channels so
that they are always bypassed from the echo-cancellation circuitry -
leaving those dedicated time-slots for digital data communication /
dedicated video transmission only.
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
E1 Echo Canceller
Features and Highlights
- User Selectable - 128ms -
Unidirectional or 64ms - Bidirectional. The user selection is made
through a user configurable software interface command
-
Compliant to ITU-T G.164, G.165, G.168
2000, G.168 2002) requirements
-
Carrier-grade voice quality per AT&T
Voice Quality Assessment Lab
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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 30-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
-
Transmission (data mode), while keeping
the echo cancellation "ON" on the remaining time-slots (voice mode),
on which echo is required to be cancelled
-
E1 Circuit by-pass in event of power
supply failure. This feature enables the by-pass of the E1 Circuit in
the event of power failure. This ensure continues signal even if the
power to the echo canceller fails
-
E1 Circuit by-pass on power failure
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E1 Circuit by-pass on Echo Canceller
card removed. This feature allows the USER to by-pass the E1 Circuit
by simply removing the echo-canceller card. E1 circuit connects
"through" as soon as echo-canceller is removed from its slot
-
Non-Linear Processor with adaptive
suppression threshold and comfort noise insertion
-
Programmable Double-Talk detection
threshold
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Narrow-Band signal detection
-
Adjustable Gain / loss settings on all channels. Provides the user the
flexibility to adjust and optimize the voice and transmit receive levels
-
Signaling Support:
-
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 CONFIGURABLE
-
Redundant Power Supply (Optional)
-
Non-Linear Processor with Comfort Noise Insertion
-
TCP / IP remote access for remote
configuration and control
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Assures operability with V.32 / V.32bis / V.34 modem and fax transmissions
Conforms to standards assuring proper public network operation and
facilitating system integration
-
Removes residual echo and minimizes
switching effects thereby providing high perceived speech quality.
Unique design provides the industry's best sounding single chip echo
canceller
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Ensure echo canceller maintains
excellent performance at all times in the presence of non-echo voice
signals. Useful for trunks that have very low echo-returns loss
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Ensure echo canceller maintains excellent performance at all times in
presence of tones or signals including DTMF tones
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Instability detector suppresses
variable pitched ringing or oscillation
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Path change detect permits fast
re-convergence when a major change occurs in the echo channel
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User selectable tail-end side. This feature allows the USER to select the
"Tail-End" side of the Echo-Canceller. The "Tail-End" side of Echo-Canceller
is that part of the network which generates / causes to generate the Echo.
Unidirectional Echo-Cancellers MUST ALWAYS be installed on far-end of any
network from the point at which an Echo is being heard. The "Tail-End" side
MUST ALWAYS face the "Source Side" of the network which is generating the
echo. Ideally suited to handle most echo situations
-
Usable in telecommunications systems
worldwide. Able to interface in most systems where linear samples are
available
Application Diagrams for the E1 Voice
Echo Cancellers
Related Links
Others Links
Technical specifications are subject to
change without notice.
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