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Orion Telecom Networks Inc. provides robust and
cost effective T1 and E1 echo canceller and voice quality enhancement
solutions for the long distance, wireline, wireless, (GSM, CDMA, TDMA),
VoIP, satellite and radio communications.
The VCL-EC, T1 echo
cancellers are 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.
We offer the following T1 /
E1 / 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 T1 Echo Cancellers
supports the following signaling protocols supported:
-
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 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 T1 circuit
by-pass in the event of power supply failure).
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.
Types of T1
Echo Cancellers offered:
64ms Bidirectional and 128ms. Unidirectional
T1 echo cancellers - User Selectable. Our T1 echo canceller is a fully
integrated 24 channel echo canceller that cancels echo up to 64ms.
bidirectional / 128ms. unidirectional - User Selectable. T1 Inputs
and Outputs are balanced 120 Ohms, RJ-45.
T1 Echo Canceller -
Technical Highlights
- 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.
-
Signaling protocols supported:
-
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 CONFIGURABLE.
- The Echo Canceller supports fax /
modem G.164 and G.165 (2100 Hz) tone disable
- Offers RS232 serial interface for
external PC COM Port and Ethernet (10Base-T) interface for remote LAN
- Redundant Power Supply (Optional)
- Automatic by-pass upon power supply
failure / removal of power supply.
- Fully integrated independent
30-channel voice echo canceller
Applications for the T1 Echo Cancellers
- Wireless: GSM, CDMA, TDMA, Digital
Cordless, PCS and Cellular Base Stations.
- Digital Circuit Multiplication Equipment
(DCME) : Satellite Communications and Multiplexers.
- PCS, cellular, mobile and digital
cordless wireless systems.
- PBX and central office systems.
- Datacomm: Voice over Frame Relay, Voice
over ATM and Voice over Internet.
- Voice over ATM, Frame Relay or packet
switching systems that provide a separate channel to carry
V.32 / V.32bis / V.34 modem and fax transmissions.
- Central Office and PBX: Network Trunks,
Echo Canceller Pool, Common Equipment and Audio Conferencing Bridges
- Voice over Datacomm including Voice over
Internet (VoIP), Voice over ATM and Voice over Frame Relay (VoFR).
Datacomm Applications
- Voice over Frame Relay
- Voice over ATM
- Voice over Internet / LAN
Central Office
and PBX Applications
- Network Trunks
- Echo Canceller Pool
- Common Equipment
- Audio Conferencing Bridges
Voice Over ATM Applications
- A multi-channel echo canceller resource
or pool is shared among many channels to reduce cost
- Echo cancellation is done at a DS0 level
Satellite Communications Applications
- Digital Circuit Multiplication Equipment
(DCME)
Wireless Applications
- GSM, CDMA, TDMA
- Digital Cordless and Cellular
Basestations
Voice Over Frame Relay, ATM Applications
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
T1 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 T1 connections on the
echo canceller card.
USER PROGRAMMABLE Signaling Option.
Our echo cancellers provide USER PROGRAMMABLE T1 signaling options
whereby the user may use our T1 Echo Cancellers just as efficiently over
a wide spectrum of T1 signaling options. The T1 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 CONFIGURABLE.
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 T1 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 time-slots of the T1 circuit for dedicated
video you may do so, using our T1 echo cancellers. Our T1 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.
T1 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.
-
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.
-
T1 Circuit by-pass in
event of power supply failure. This feature enables the by-pass of the
T1 Circuit in the event of power failure. This ensure continues signal
even if the power to the echo canceller fails.
-
T1 Circuit by-pass on
power failure
-
T1 Circuit by-pass on
Echo Canceller card removed. This feature allows the user to by-pass
the T1 Circuit by simply removing the echo canceller card. T1 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.
-
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
-
The T1 echo cancellers
supports the following signaling protocols supported:
-
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 CONFIGURABLE.
-
Redundant Power Supply (Optional)
-
Non-Linear Processor with Comfort Noise Insertion
-
TCP / IP remote access for remote configuration and control.
-
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.
-
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.
-
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.
-
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 T1 Voice Echo Cancellers
Related Links
Others Links
Technical specifications are subject to change without
notice.
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