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Product
Overview
Orion Telecom Networks Inc. offers the industry's most
compact 8 x E1 voice quality enhancement (VQE) and echo
canceller solution in a 19-inch, 1U (44mm height) chassis, with
echo tail-displacement feature
(echo tail off-set) feature which is user programmable from 0ms.
to 896 ms. Echo cancellation on each channel is 128 ms.
bidirectional (near-end and far-end) echo cancellation. The 8 x
E1 VQE and echo canceller solution offers a unique, user
definable echo-tail displacement feature which may be programmed
by the user, between 0ms. to 896ms. on the return path to cancel
echo-tails, both at the near-end and the far-end, in the most
demanding network conditions. T1
version echo VQE and echo cancellers are also
offered and available.
Orion offers echo cancellation and voice quality enhancement
solutions for the following network situations:
- Wireline
- International Gateway
- Wireless
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| The echo canceller
solutions are also ideal for long distance telephony, GSM, CDMA,
TDMA, VoIP, satellite and radio communication applications. |
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. Echo cancellation on each channel is
128ms. Bidirectional with user definable echo-tail displacement
between 0ms. to 896ms.
Key Highlights of the Orion E1 Echo
Canceller solution
- Orion offers the industry’s most compact 8 x voice quality
enhancement (VQE) & E1 echo cancellers solution. 8 E1 (or T1)
echo cancellers in a 1U (44mm) high chassis – industry’s
smallest footprint
- 128 ms. bidirectional (near-end and far-end) echo
cancellation with echo-tail displacement (tail-offset) from
0ms.to 896ms
- Programmable echo-tail displacement (echo tail off-set)
from 0ms.to 896ms
- Echo-Tail Displacement allows user to programmed lay
off-set on return path and user can cancel near-end and
far-end echo from single installation
- Ideally suited for GSM Networks to eliminate "back ground
noise" to enable GSM Networks to function at half-rate (HR)
(with full-rate voice quality) there by doubling spectrum
usage in GSM networks
- Echo Cancellation on each channel is128ms.bidirectional
(near-end and far-end)
- Compliant to ITU-TG.164,G.165,G.168 (2000 / 2002)
recommendations
- Electrical Echo Cancellation resulting from networks
delays and delays arising due to complex voice compression
algorithms in hybrid PSTN and long distance networks
- Acoustic Echo Cancellation required for mobile networks
for cancelling echo-tails that originate form cellular
hand-sets, designed with poorly designed acoustic feedback
- Auto Voice Level Control and VQE (Voice Quality
Enhancement features) required for reducing background noise
from calls originating from crowded public places or other
noisy environments and maintaining a uniform Voice level in a
Network. Improves voice quality
- User programmable dedicated data channels
- Remote access through Telnet
- 8 xE1 (orT1) VQE and echo cancellers in a 1U (44mm) high
chassis - industry’s smallest footprint
- R2, CAS, PRI ISDN (30B+D), C5, CCS, Q50 (AB/CD), C7, SS7
User Programmable signaling options
Cancels near-end and far-end
echo from single installation
CCS, Q50 (AB/CD)
Applications include wireline,
wireless, satellite, international / long distance gateways,
DCME and radio communication networks
Usable in telecommunications
systems worldwide
Type of
VQE and E1 Echo Canceller offered
8 E1 Echo Cancellers per 19 inch, 1U (44mm) chassis
8 x Voice Quality Enhancement (VQE) E1 echo canceller
19inch, 1U (44mm) chassis, 128ms.
bidirectional echo cancellation tail. E1 Inputs and Outputs are balanced 120 Ohms,
RJ-45.
Question. What is
tail-displacement?
Answer:-
Echo tail-displacement (echo tail off-set) is an important
feature used in bidirectional echo cancellation, to make it
effective and useful for bidirectional echo cancellation.
Explanation:
Bidirectional (defined as near-end and far-end automatic echo
cancellation operation) echo cancellers have the capability of
canceling
echoes in BOTH directions (on the Transmit as well as the
Receive paths), by installing them at a single location.
Bidirectional echo cancellers can be installed at a single
location, either the Near-End or the Far-End, and used to cancel
BOTH Near-End and Far-End echo-tails, from a single
installation.
Usually, satellite links and
intercontinental VoIP circuits have fixed network delays which
exceed the capabilities of commonly available (192ms)
echo cancellers for bidirectional echo cancellation, thus
making them unsuitable for bidirectional echo cancellation.
Example:
An inter-continental
satellite or a VoIP link may have a fixed end-to-end round-trip
delay of 300ms, thereby rendering all commonly available
echo cancellers, with even 192ms echo cancellation capabilities,
in-effective for bidirectional echo cancellation.
Using the Echo Tail-Displacement
(echo tail off-set) feature, the User may offset and account for the fixed
round-trip network delay on the return path so that the
echo cancellation window on the return-path is shifted by
300ms., so as to allow the bidirectional echo canceller to
function effectively in BOTH directions and to cancel BOTH
Near-End, as well as the Far-End echo-tails on the return path,
even if the echo canceller is installed at the Near-End in a
given network.
Echo Tail-displacement allows the user
to program a delay off-set on the return path, so that the User
may cancel both near-end and far-end echo-tail with a single
Echo Canceller installation. The echo tail-displacement allows the
user to compensate for the fixed network delays on the return
path of the echo-tail, so that the user can effectively cancel,
both near-end and far-end echoes using a single Echo Canceller
without being limited by the fixed end-to-end delay of that
network link.
Orion's Echo Canceller has a user
programmable "echo tail-end displacement" (echo tail
off-set) from 0ms. to 896ms.
This feature allows the use of a
single Echo Canceller installation to cancel echo-tails in both
directions over inter-continental satellite or VoIP links where
the fixed network delays are excessive (beyond and in excess of
(example) 192ms. echo cancellation capability of the most
commonly sold bidirectional Echo Canceller solutions).
Question. My Network has a total of
300ms. end-to-end delay. How can I use a 128ms. bidirectional
echo canceller to cancel, both, near-end and far-end echoes?
Answer. The use of
the "programmable echo tail-displacement" feature in our Echo
Cancellers allow the user to cancel echoes on the return path
even if the network delays exceed 128ms.
The fixed network delay shall be
calculated ascertained and programmed as the "echo
tail-displacement" on the return path. This shall allow the user
to use a single Echo Canceller to cancel echoes,
bidirectionally, even if the total network end-to end delay is
in excess of 300ms.
The Orion 128ms., bidirectional
Echo Canceller solution, equipped with a user programmable
"echo tail-displacement" feature is superior than a simple single
192ms. bidirectional Echo Canceller solution for canceling
both near-end and far-end echoes, even if the fixed round-trip
network delays exceed 300ms (please see the example above).
E1 Echo
Canceller - Highlights
Provides voice echo cancellation
of up to 128ms Bidirectional for 8 E1
Echo Cancellers
- Meets ITU-T G.164, G.165,
G.168 (2000 / 2002) requirements for echo cancellation
- Custom user definable
echo-tail displacement between 0ms. to 896ms. This allows the
user to cancel echo in both directions (near-end and far end),
even in most difficult conditions i.e. excessive transmission
delays that are common on VoIP networks and satellite links
- Voice Quality Enhancement:
- Removes background noise
- Automatic level control
(maintains VF levels)
- Acoustic Echo Control
- Adaptive listener Enhancement
- 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)
- C5, CCS, Q50 (AB/CD)
- All signaling options are User
Selectable / User Programmable
- Allows digital data
transmission on user-selected time-slots
- E1 link by-pass on power
failure. This feature helps to maintain the link integrity
even in the event of power failure
- The Echo Canceller supports
fax / modem G.164 and G.165 (2100 Hz) tone disable
- User selected clock /
synchronization option - Internal, External and Loop-Timed
clock
- Stratum 3e clock for stable
Internal clock / holdover clock in the event of failure of any
of the selected clock sources
- Remote access through telnet
over LAN / TCP-IP link (10/100BaseT)
- 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 independent 8 E1 (or T1)
echo canceller
Unique E1
Echo Canceller Feature:
USER PROGRAMMABLE TAIL DISPLACEMENT: User
definable echo-tail displacement is selectable between 0ms. to
896ms. on the return-path. This feature allows the user to
cancel echo-tails in BOTH directions (both near-end and far-end
echo tails), even in most demanding conditions that are common
on VoIP networks and satellite links.
USER
PROGRAMMABLE SIGNALING OPTION: The E1 Echo Cancellers
support 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 / C7
Signaling (on any user selected time-slot), C5, CCS, Q50
(AB/CD). All signaling options are User Selectable / User
Programmable. Allow digital data transmission on user-selected
time-slots.
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.
Signaling Support
The E1 Echo
Cancellers support 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)
-
C5, CCS, Q50 (AB/CD)
-
All signaling
options are User Selectable / User Programmable
-
Allow digital data transmission on user-selected time-slots
Voice Quality
-
Acoustic Echo
Control (AEC)
-
Adaptive Noise Reduction (ANR)
-
Automatic Level Control (ALC)
-
Adaptive Listner Enhancement (ALE)
Fault Recovery
The echo canceller
equipment offers fault recovery feature. It offers automatic
by-pass upon power-supply failure (i.e. it offers E1 circuit
by-pass in the event of power supply failure).
Remote Monitoring and Control
- Remote access through telnet
over LAN / TCP-IP link (10/100BaseT)
- 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
Application Diagrams for the E1 Voice Echo Cancellers
- Application Diagram - 128ms
Bidirectional E1 Echo cancellers.
Related Links
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Technical specifications are subject to change without
notice.
All brand names and trademarks are the property of their respective owners.
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