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Appendix A:
Item
Physical
PC card (rackmount installation)
Height (SC 553 card only)
(With 530 Card)
Width
Depth
Weight (SC 553 card only)
Shipping weight (SC 553 card only)
Environmental
Temperature
Operating
Non-operating
Humidity, operating
Altitude
Operating
Non-operating
Electrical
Power dissipation
Fusing
Data rates
Communication line
Line impedance
Network and Cascade port physical
interface
076R155-000
Issue 7
Technical Characteristics
0.81 in. (21 mm)
1.75 in. (45 mm)
7 in. (178 mm)
9.5 in. (241 mm)
10 oz (0.28 kg)
1 Ib 10 oz (0.74 kg)
32° to 122°F (0° to 50°C) (Derate by 1°C/1000 ft above sea
level)
–40° to 185°F (–40° to 85°C)
5% to 95% without condensation
0 ft to 10,000 ft (0 m to 3,047 m)
0 ft to 40,000 ft (0 m to 12,191 m)
6 W maximum
Two 2.5 A, 125 V (GDC Part No. 215-201-009)
One 5 A, 125 V (GDC Part No. 215-201-021)
N x 64 kbps or N x 56 kbps (N = 1 to 24); maximum
aggregate (payload) rate of 1,536,000 bps
T1 digital carrier (non-loaded, staggered-twist ABAM, PIC, or
pulp-insulated exchange-type cable, 19 to 26 gauge)
100 Ohm
RJ48C modular jack
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Specification
A-1
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