|
T1 Quad Echo Canceller
Upto 32 T1 Echo Cancellers per Shelf / Chassis
Technical Specifications
|
Network Interface
|
Number of Echo Cancellers
per shelf |
32 T1 Echo Cancellers (4 T1 Echo Cancellers per EC card)
32 T1 Inputs (RJ-45)
32 T1 Outputs (RJ-45) |
|
Line Rate |
T1 - 1.544 Mbps |
|
Line Code |
B8ZS, AMI (User
Selectable) |
|
Frame Structure |
D4, ESF (User
Selectable) |
|
PCM Encoding |
Mu Law as per ITU-T
G.711 |
|
Signaling |
Pass-Through 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
|
|
PCM Sampling Rate |
8000 Samples / sec. |
|
Bit Rate |
1544 Kbps ± 50 ppm |
|
Jitter Tolerance |
As per ITU-T G.823 |
|
Output Jitter |
< 0.05 UI (in the
frequency range of 20Hz to 100 Khz) |
|
Nominal Line Impedance |
100 Ohms Balanced RJ
45 |
|
Nominal Pulse Width |
Width 244 ns |
|
Pulse Mask |
as per ITU (CCITT) Rec. G.703 |
|
Permissible Attenuation |
6 dB at 1 MHz |
Return Loss at:
51.2 KHz to 102.4 Khz
102.4 KHz to 2048KHz
2048KHz to 3072 Khz |
> 12dB
> 18dB
> 14dB |
|
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 |
Power Supply Specifications
|
Input DC Voltage |
-48V DC ( nominal ) |
|
Range of Input |
-40V to -60V DC |
|
Output Voltage |
+3.3V |
|
Full Load Output Current |
20A at +3.3V, (Full
System) |
|
Input Voltage Reversal
Protection |
Provided in the Card |
|
Over Current Protection |
20.5A for +3.3V |
|
Short Circuit Protection |
Current limit - 20.5A.
Recovers on removal of short |
|
Under Voltage |
< 3.17V |
|
Over Voltage |
3.5V |
|
Efficiency at full load |
>90% |
|
Ripple at full load |
<5mVrms |
|
Spike at full load |
<50mV |
Management Port Specifications RS232 COM Port
Serial Port: 9.6Kbps (Async). ASCII /
VT100 / HyperTerminal.
10BaseT Ethernet: Telnet
Power Consumption of Quad T1 Echo Cancellers
Card in Use
Input Voltage = - 48 Volt DC |
Current
(in Amps.) |
Power
Consumption
(in Watts) |
| 1 EC Card + PSU
Card + NMS Card |
0.22 |
11.0 |
8 EC Cards (32
T1 Echo Cancellers)
+ PSU Card + NMS Card |
1.56 |
75.0 |
Echo Cancellation
|
Echo Tail Cancellation |
Up to 64ms
Bidirectional / 128ms Unidirectional 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 |
|
Convergence time
for 90% ERLE |
< 50ms for combined ERL & ERLE of 30dB |
|
Tone Disabler
(for Data Transmission) |
As per ITU-T rec. G.164 and G.165 |
|
Detection
Threshold |
-33dBm0 +/- 2dB at 2100Hz |
|
Disable operate
time |
350 +/- 50ms |
|
Disable release
time |
300 +/- 100ms |
|
Idle Channel
Code Detection |
Idle Channel Code Detection |
|
Note: Idle channel code detection is automatic and each
echo-canceller channel re-converges when Idle Channel Code
is detected as per ITU-T Q503 upon initiation of each new
call. |
|
Transmit /
Receive Levels (Programmable) |
Selectable Levels Options:
-12, -9, -6, -3, 0, +3, +6, +9 |
|
Comfort Noise
Insertion |
User Selectable - ON/OFF |
|
NLP |
User Selectable - ON/OFF |
Signal
Processing Delay :
1) Transmit Channel
1) Receive Channel |
< 0.250ms
< 60 micro seconds |
|
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
- Equipment alarm
- LEDs for power ON/OFF
|
|
Power Supply Redundancy |
Optional: -48V DC
Power Supply (1+1) |
|
Environmental - Operational |
00 C
to 500 C |
|
Humidity |
5% to 95%,
non-condensing |
|
Alarm Extension |
Normally Open
(NO) & Normally Closed (NC) Through Backpanel (3 Pin
Connector) |
Management Port Specifications 10BaseT LAN Management Port
(with Telnet)
| 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 |
Serial login,
Telnet login, GUI (Graphical User Interface) |
| 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 N55024:1998
- RF Common Mode Conducted Susceptibility complies
with EN55024:1998
|
Shelf Description
|
Slot 1 |
-48V DC Shelf Power Supply Card (Support upto 32, echo
cancellers) |
VCL-EC128-1110 |
|
Slot 2 |
-48V DC Shelf Power Supply Card (Support upto 32, echo
cancellers) |
VCL-EC128-1110 |
|
Slot 3 |
GUI Access Card for shelf configuration - allow The user to
access configure and control upto 32, T1 Echo Cancellers -
includes configuration and Management software for Windows
98, Windows 2000 and Windows XP |
VCL-EC128-NMS-1000-4 |
|
Slot 4 to Slot
11 |
19 inch shelf - 6U High (sub-rack) and connectorized
Backplane, (One, 19-inch shelf can accommodate upto 32, T1
echo cancellers) |
VCL-EC128-1000-4 |
Mechanical Specifications
|
Rack Mounting |
Standard 19 Inch. DIN Rack |
|
Height |
266.66 mm |
|
Depth |
292 mm |
|
Width |
482 mm |
|
Weight |
10.00 Kg. (32, Echo Cancellers) |
Others Links
Technical specifications are subject to change without
notice.
All brand names and trademarks are the property of their respective owners. |
|
|
|
|
