Dialogic SS7G21 - Manual (Page 19)

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Dialogic ® SS7G21 and SS7G22 Signaling Servers Hardware Manual Issue 7
3.10 Physical Specifications
The physical specifications of the SS7G21 and SS7G22 are described as follows:
•
Height:
3.45 inches (87.6 mm)
•
Width:
17.11 inches (434.6 mm)
•
Depth:
20 inches (508 mm)
•
Front clearance:
2 inches (76 mm)
•
Side clearance:
1 inch (25 mm)
•
Rear clearance:
3.6 inches (92 mm)
•
Weight:
18.5 Kgm for a fully-loaded system
3.11 Environmental Specifications
The environmental specifications for the SS7G21 and SS7G22 are described as follows:
•
Temperature, operating:
+5°C to +40°C (+41°F to +104°F)
•
Temperature, non-operating:
-40°C to 70°C (-104°F to 158°F)
•
Humidity, non-operating:
95%, non-condensing at temperatures of 23°C to 40°C (73°F to 104°F)
•
Acoustic:
Sound pressure: < 55 dBA at ambient temperatures < 28°C measured at bystander positions in
operating mode
3.12 Product Reliability
Product reliability varies depending on the number of Power Supply Modules and the number of Dialogic ®
SS7 Signaling Boards. Table 2 shows the values of Mean Time Between Failure (MTBF) for Single power
supply operation, but for Dual power supply operation it shows the values of Mean Time Between
Interruption (MTBI). The MTBI values are valid on the assumption that a failed Power Supply Module is
replaced within a reasonable period of time.
Table 2. Calculated Product Reliability
Dialogic ®
Model
Reliability
with:
Zero SS7
Signaling Board
One SS7
Signaling Board
Two SS7
Signaling Boards
Three SS7
Signaling Boards
SS7G21
Dual Power Supply
Modules:
n/a MTBI = 66,700 hrs MTBI = 50,200 hrs MTBI = 40,300 hrs
Single Power Supply
Module:
n/a MTBF = 55,700 hrs MTBF = 43,700 hrs MTBF = 36,000 hrs
SS7G22
Dual Power Supply
Modules:
MTBI = 99,400 hrs MTBI = 57,300 hrs MTBI = 40,200 hrs MTBI = 31,000 hrs
Single Power Supply
Module:
MTBF = 76,700 hrs MTBF = 49,000 hrs MTBF = 35,900 hrs MTBF = 28,400 hrs
Note: Predictions in accordance with the Bellcore ® Method @ 40°C.