|
|
|
| Digital Interface at 2048 Kbps |
| Number of Interfaces |
2 |
| Conformity |
G. 703 |
| PCM Sampling Rate |
8000 samples/ sec |
| Encoding Law |
A law as per ITU
(CCITT) G.823 |
| Bit Rate |
2048 kbps ± 50 ppm |
| Code |
HDB3 |
| Nominal Impedance |
120W balanced / 75W unbalanced |
Peak Voltage of a mark
For 120W Balanced Interface
For 75W Unbalanced Interface |
3.0 V ± 0.3 V
2.37 V ± 0.237 V |
Peak Voltage of a space
for 120W
Balanced Interface
for 75W Unbalanced Interface |
0 V ± 0.3 V
0V ± 0.237 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
102.4 KHz to 2048KHz |
>12dB
> 18dB |
| 2048KHz to 3072 KHz |
> 14dB |
| Jitter Tolerance |
As per ITU (CCITT)
G.823 |
| Frame Structure |
As per ITU (CCITT)
G.704 |
| Signaling |
Channel Associated
Signaling |
| 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 |
| E&M,
4 Wire Voice Frequency Interface: |
| Number of Channels per
Card |
2 |
| Maximum Number of
Channels |
30 |
Performance
Characteristics:
between Voice Frequency Ports
for separate Send and Receive side |
As per ITU (CCITT) G.712
As per ITU (CCITT) G.714 |
| Receive Level ( Nominal
) |
- 3.5 dBr |
| Receive Level ( Minimum
) |
-14.0 dBr |
| Transmit Level (
Nominal ) |
- 3.5 dBr |
| Transmit Level (
Maximum ) |
+ 4.0 dBr |
| Range of Level
adjustment |
15 dB |
| Level Adjustment |
In steps of 0.5 dB |
| E&M, 2 Wire Voice Frequency Interface: |
| Number of Channels per Card |
2 |
| Maximum Number of Channels |
30 |
Performance Characteristics:
Between Voice Frequency Ports |
.
As per (ITU) CCITT G.713 |
| Receive Level ( Nominal ) |
0.0 dBr |
| Receive Level ( Minimum ) |
-11.0 dBr |
| Transmit Level ( Nominal ) |
-2.0 dBr |
| Transmit Level ( Maximum ) |
0.0 dBr |
| Range of Level adjustment |
15 dB |
| Level Adjustment |
In steps of 0.5 dB |
| 2 Wire, Subscriber Loop Interface (POTS) (FXO-FXS) |
| Number of Channels per Card |
2 |
| Maximum Number of Channels |
30 |
| Transmission performance |
Fully compliant to ITU (CCITT)
G.713 specifications |
| Line Impedance |
600W (900W optional) |
| Voice Channel Frequency |
300Hz - 3400Hz |
| Insertion Loss |
-2.0dB Nominal (User adjustable in
steps of 0.5dB through Network Management Software |
| Idle Channel Noise |
£ -65dB |
| Return Loss |
300Hz - 600Hz -³ 12dB
600Hz - 3400Hz -³ 15dB |
| Longitudinal Balance |
³ 46dB
between 300Hz to 3400Hz |
| Ring Frequency |
25 Hz (20Hz, Optional) |
| Ring Voltage |
³ 40
volts RMS into a load of 5 R.E.N. with a 0.30 Erlang traffic pattern |
| Subscriber Loop Current |
³ 23mA
into a subscriber loop of 1000 ohms |
| Overload Level |
+3.14dBm ± 0.5dBm |
| Battery Reversal |
All channels |
| Periodic Metering |
16 KHz (Optional) |
| Dial Pulse Speed |
8 -12 pps |
| 2 Wire, Hot Line Interface (FXS-FXS) |
| Number of Channels per Card |
2 |
| Maximum Number of Channels |
30 |
| Performance characteristics |
As per G.713 |
| Receive and Transmit levels |
Same as 2W E&M specifications |
| Range of level adjustment |
7 dB |
| Level Adjustment |
In steps of 0.5 dB |
| Operating Voltage |
-48 V dc ( Nominal ) |
| Loop Resistance |
600 ohm |
Ring Voltage:
Output :
Ring Frequency : |
.
³ 40 Vrms into a 5 R.E.N. load
25 Hz (20 Hz, Optional) |
| High Speed Synchronous Data Interface (V.35) |
Number of Interfaces per Card
Or |
1 ~ "N"
x 64KBits/Sec. per card
2 ~ 64 KBits/Sec |
| Maximum Number |
30, V.35, 64KBits/Sec Interfaces or
propotional number of "N" x 64KBits/Sec Interfaces (maximum
value of "N" = 16). |
| Conformity |
To CCITT Rec. V.35 |
| Mode |
Synchronous |
| Bit Rate |
64 Kbps |
| G.703 Data Interface (Co-Directional, 64kbps) |
| Number of Interfaces per Card
|
2 |
| Maximum Number |
30, G.703, 64KBits/Sec Interfaces,
(co-directional) |
| Conformity |
To ITU (CCITT) Rec. G.703 |
| Mode |
Synchronous |
| Bit Rate |
64 Kbps |
| Low
Speed Data Interface (V.24) |
| Number of Interfaces per Card |
2 |
| Maximum Number |
30 |
| Conformity |
To ITU (CCITT) Rec. V.24 |
| Mode |
Synchronous / Asynchronous |
| Bit Rate |
2.4 / 4.8 / 7.2 / 9.6 / 19.2 Kbps |
| Clock Synchronisation |
| Synchronisation Sources |
Internal Clock, External Clock,
timing derived from incoming HDB3 links |
| External Clock Input |
As per ITU (CCITT) Rec. G.703 |
| Impedance of External Clock Input
Port |
120W balanced / 75W
unbalanced |
| Default Option |
Internal Clock |
| Power
Supply |
| Input DC voltage |
-48V DC ( nominal ) |
| Range of input |
-40V to -60V DC |
| Output voltages |
+5V, -5V, filtered -48V ( for term.
cards) |
| Full Load Output Current |
4A at +5V, 0.5A at -5V |
| Input Voltage Reversal Protection |
Provided in the Card |
| Over Current Protection |
6A for +5V, 0.5A for -5V |
| Short Circuit Protection |
Current limit - 6A. Recovers on
removal of short |
| Under Voltage |
< 4.5V |
| Over Voltage |
5.4V to 5.6V |
| Efficiency at full load |
>70% |
| Ripple at full load |
<5mVrms |
| Spike at full load |
<50mV |
| Power Consumption |
42W (Nominal) |
| Mechanical Specifications |
| Rack Mounting |
Standard 19 inch DIN rack |
| Height |
133.35mm |
| Depth |
260mm |
| Width |
477mm |
| Weight |
8.00
Kgs |
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1997-2005. All rights reserved. |
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