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VCL-EC128-E1,
Voice Echo Canceller is a fully integrated 24-channel echo canceller that cancels echo of
up to 128ms. Each of the 24 channels cancels echoes up to 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 balanced 100 Ohms, RJ-45.
E1, VCL-EC128, Voice Echo Canceller - Technical Specifications
| Provides voice echo
cancellation of up to 64ms / 128ms, User Selectable |
| Meets ITU-T G.164 and G.165
and G.168 recommendations. |
| Non-Linear Processor with
Comfort Noise Insertion |
| Redundant Power Supply
(Optional) |
| E1 Circuit by-pass in the
even of power supply failure. |
| Fully integrated
independent 30-channel voice echo canceller |
| Supports Signaling: 30B+D
PRI ISDN (Euro ISDN) , 31B (31 voice channels) with out-of-band, R2 CAS,
SS7 - User Selectable |
E1 Interface at 2048
Kbps
| Number of Interfaces
|
2,
1 - Input (RJ-45)
1 - Output (RJ-45) |
| Conformity
|
G.703 |
| Frame Structure
|
As per ITU (CCITT) G.704
|
| Signaling
|
Pass-Through |
| PCM Sampling Rate
|
8000 Samples / sec |
| Encoding Law
|
A Law as per ITU (CCITT) G.711 |
| Bit Rate
|
2048 Kbps ± 50 ppm |
| Code
|
HDB3 |
| Nominal Impedance
|
120 W balanced |
| Peak Voltage of a mark
For 120 W Balanced interface
|
3.0 V ± 0.3 V |
| Peak Voltage of a space
for 120 W Balanced interface
|
0 V ± 0.3 V |
| Nominal Pulse Width
|
244 ns |
| Pulse Mask
|
as per ITU (CCITT) Rec. G.703 |
| Output Jitter
|
< 0.05 UI (in the frequency range
of 20Hz to 100 Khz) |
| Permissible Attenuation
|
6 dB at 1 MHz |
|
Return Loss at:
|
| 51.2 KHz to 102.4 Khz
|
> 12dB |
| 102.4 KHz to 2048KHz |
> 18dB |
| 2048KHz to 3072 Khz |
> 14dB |
| Jitter Tolerance
|
As per ITU (CCITT) G.823 |
| Loss and recovery of frame alignment
: |
As per clause 3 of ITU (CCITT) G.732 |
| Loss and recovery of multiframe
alignment : |
As per clause 5.2 of ITU (CCITT)
G.732 |
Echo Cancellation
| Echo Tail Cancellation |
Up to 64ms Bi-Directional / 128ms
Uni-Directional - User Selectable |
| Tone Disabler |
As per ITU-T G.164, G.165 |
| ERLE (Echo Return Loss
Enhancement) |
>35dB (with 6dB ERL) at 10dBm0 input
>65dB with NLP enabled |
| ERL (Echo Return Loss) |
Selectable Levels Options : 0, 3, 6 dB |
| Transmit / Receive Levels (Programmable) |
Selectable Levels Options: -12,
-9, -6, -3, ,0 +3, +6, +9 |
| Comfort Noise Insertion |
User Selectable - Enable / Disable |
| Local Monitoring and Control |
RS232 serial interface for Management through
a PC COM Port |
| Remote Monitoring and
Control |
Ethernet (10BaseT) interface for remote LAN
Management and Control |
| Local and Remote Provisioning |
CLI (text commands) and GUI |
| Front Panel Indicators |
- In SYNC / Failure
- Individual Card
- LEDs for power on/off |
| Power Supply Redundancy |
Optional: -48VDC Power Supply (1+1) |
| Environmental-Operational |
0° C to 50° C |
| Humidity |
5% to 95%, non-condensing |
NMS (with Telnet)
xPort Specifications
|
Network Interface |
RJ-45 Ethernet 10BaseT or 100BaseT-TX (auto sensing) |
|
Compatibility |
Ethernet Version 2.0 IEEE802.3 |
|
Protocols Supported |
ARP, UDP/IP,
TCP/IP, Telnet, ICMP, SNMP, DHCP,
BOOTP, TFTP,
Auto IP, SMTP and HTTP |
|
LEDs |
10Base-T &
100Base-TX Activity, Full/half duplex. |
|
Management |
Internal web
server, SNMP (read only), Serial login, Telnet login |
| EMI
Compliance |
Radiated &
conducted emissions - complies with Class B limits of EN 55022:1998
Direct &
Indirect ESD - complies with EN55024:1998
RF
Electromagnetic Field Immunity - complies with EN55024:1998
Electrical
Fast Transient/Burst Immunity - complies with EN55024:1998
Power
Frequency Magnetic Field Immunity - complies with EN55024:1998
RF Common Mode
Conducted Susceptibility - complies with EN55024:1998 |
|
Mechanical
Specifications |
|
Rack Mounting |
Standard 19 Inch. DIN Rack |
|
Height |
133.35mm |
|
Depth |
292mm |
|
Width |
482mm |
|
Weight (Net) |
7.50
Kg. (10, Echo Cancellers) |
| Echo Canceller
Technical Specification |
- Provides voice echo cancellation of up
to 64 / 128ms.
- Conforms to ITU-T G.165 and G.168
- G.164 / G.165 disable tone detection
- Non-Linear Processor with Comfort Noise
Insertion
-
Narrow-Band Detector
- Eliminates long echo tail.
|
Others Echo
Cancellers Solutions:
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