T1 GSM Gateway
Technical
Specifications
| T1 Interface Card | Power Supply Card |
|
GSM Access Card | Echo Canceller Card |
T1 Interface Card
| Number
of T1 Interfaces |
One |
| Conformity |
G.703 |
| Frame
Structure |
D4 |
| PCM
Sampling Rate |
8000
samples / second. |
| Encoding
Law |
Mu Law |
| Bit Rate |
1544Kbps
50ppm. |
| Code |
AMI,
B8ZS - Selectable |
| Nominal
Impedance |
100 Ohms
Standard
(75 Ohms Optional) |
| Connector |
RJ45
(100 Ohms Impedance) |
Peak
Voltage of a mark
For 100 Ohms Balanced Interface |
3.0 Volt 0.3 Volt. |
| Pulse
Mask |
As per
ITU-T (CCITT) Rec. G.703 |
| Output
Jitter |
<0.05UI
(in the frequency range of 20Hz to 100KHz). |
| Permissible
Attenuation |
6dB at
1MHz |
Return
Loss at:
51.2 KHz to 102.4 KHz.
102.4 KHz to 2048 KHz
2048 KHz to 3072 KHz |
> 12dB
> 18dB
> 14dB |
| Jitter
Tolerance |
As per
ITU-T (CCITT) G.823 |
| Loss and
Recovery of Frame Alignment |
As per
Clause 3 of ITU-T (CCITT) G.732 |
| Loss and
Recovery of Multi-Frame Alignment |
As per
Clause 5.2 of ITU-T (CCITT) G.732 |
Power Supply
Card
| Input DC voltage |
-48V DC ( nominal ) |
| Range of input |
-40V to -60V DC |
|
Output voltage |
+5V |
| Full Load Output
Current |
18A@5VDC |
| Input Voltage
Reversal Protection |
Provided in the Card |
| Over Current
Protection |
20A for +5V |
| Short Circuit
Protection |
Current limit - 20A.
Recovers on removal of short |
| Under Voltage |
< 4.5V |
| Over Voltage |
5.4V to 5.6V |
| Efficiency at full
load |
>80% |
| Ripple at full load |
<5mVrms |
| Spike at full load |
<50mV |
| Power Consumption |
120 Watts (Worst
Case) |
GSM Access Card
| Number of GSM
Interfaces |
1 ~ 24 (Stackable, 1
thru 24). |
| Type |
1. Dual Band EGSM
900 MHz and EGSM 1800 MHz.
2. Dual Band EGSM 900 MHz and EGSM 1900 MHz.(Optional) |
| Compliance |
Compliant with ETSI
GSM
Phase 2+ standard (Normal MS)
Class 4 (2W @ 900MHz)
Class 1 (1W @ 1800 MHz / 1900 MHz (Optional)) |
| Approvals |
Fully Type Approved
to GSM Standards |
| SIM Interface
Internal Tray |
Toolkit Class 2. 3V
Reader |
| Voice Features |
Full Rate, Enhanced
Full Rate And Half-Rate (FR/EFR/HR) |
| DTMF |
Dual Tone Multi
Frequency Function (DTMF)
Dialing Support |
Alarms
An alarm shall be displayed in LED L1 / L2 for the following reasons
- Invalid SIM Card
- Unregistered SIM Card
- Faulty SIM Card
- Faulty GSM Module
- GSM Access Card Out of Range
Echo
Canceller Card
- Provides voice echo cancellation of up to 64ms / 128ms
- Conforms to ITU-T G.165 and ITU-T G.168
- G.164 /G.165 disable tone detection
- Non-Linear Processor with Comfort Noise Insertion
- Narrow-Band Detector
- Eliminates long echo tail.
T1 Echo Canceller Card - T1
Interface (Optional)
| Number
of Interfaces |
2,
1 - Input (RJ-45),
1 - Output (RJ-45) |
| Conformity |
G.703 |
| Frame
Structure |
As per
ITU (CCITT) G.704 |
| PCM
Sampling Rate |
8000
Samples / sec |
| Encoding
Law |
Mu Law
as per ITU (CCITT) G.711 |
| Bit Rate |
1544
Kbps ± 50 ppm |
| Code |
HDB3 |
| Nominal
Impedance |
100 W balanced |
Peak
Voltage of a mark
For 100 W balanced
interface |
3.0 V ± 0.3 V |
Peak
Voltage of a space
For 100 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
102.4 KHz to 2048KHz
2048KHz to 3072 Khz |
> 12dB
> 18dB
> 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 |
Mechanical
Specifications
| Rack Mounting |
Standard 19-Inch DIN Rack |
| Height |
6U (265 mm) |
| Depth |
290 mm |
| Width |
19-inch (477mm) |
| Weight |
10.5Kgs. (Net) |
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Technical specifications are subject to
change without notice.
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owners. |
