DescriptionVCL-EC, E1 Voice Echo Canceller is a fully integrated 30
channel echo canceller that cancels echo up to 64ms. / 128ms - User Selectable. Each of
the 30 channels cancel echo up to 64 / 128ms with disable tone detection and meets ITU-T
G.165 and ITU-T G.168 requirements for echo cancellation. E1 Inputs and E1 Outputs are 120
Ohms, RJ45. T1
echo cancellers are also offered and available.
We offer the following E1 / T1 / DS3 echo
canceller solutions.
- E1/T1 echo canceller - desk top (modem type version)
- E1/T1 echo canceller - 19 inch rack 1U version with telnet
- E1/T1 echo canceller - 19 inch rack 3U version (10 echo
cancellers
per shelf)
- E1/T1 echo canceller - 19 inch rack 6U version HIGH-DENSITY
(32, echo cancellers per shelf)
- DS3 echo cancellers
Type of E1 Echo Canceller offered - upto 10 E1 Cancellers per 19 inch 3U High Chassis
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
VCL-EC, E1 Voice Echo
Canceller: Shelf Description
The VCL-EC, E1 Voice Echo Canceller is a 3U, 19
Inch Shelf, fitted with a backplane that provides rear access of all external interfaces.
The E1 interface, power input, alarm extension are all accessed from the system backplane.
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Front View
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| Front View (Left to Right) |
Card Details
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Part No. |
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Slot 1 |
PS,
Power Supply Card
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VCL-LD-110 |
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Slot 2 to Slot 11 |
EC, Echo Canceller Card
(64ms. b-directional / 128ms. uni-directional) - User Selectable |
VCL-EC |
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Slot 12 |
GUI Access Card
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VCL-EC128-NMS |
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| Rack Mounting |
Standard 19 Inch. DIN Rack |
| Height |
133.33mm. |
| Depth |
292mm. |
| Width
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482mm. |
| Weight
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7.50 Kg. (10, Echo Cancellers) |
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E1 Echo Canceller - 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.
- 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.
- Carrier-grade voice quality per AT&T Voice Quality
Assessment Lab.
- 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
- Redundant Power Supply (Optional)
- E1 link by-pass on power failure. This feature helps to
maintain the link integrity even in the event of power failure
- Automatic E1 link by-pass upon removal of power supply
- 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.
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)
Redundancy
The echo canceller is equipped to offer
redundant power supply (optional).
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
Related Links
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