IBM SAN40B-4 - System Storage Switch, User & Service Manual

Page: 61 / 79

Table 12. Environmental requirements (continued)
Condition Acceptable range during operation Acceptable range during
non-operation
Air flow High speed, 13,000 RPM, 29 cubic
feet/minute
Low speed, 7000 RPM, 22 cubic
feet/minute
None required
Memory specifications
The switch memory specifications are shown in Table 13.
Table 13. Memory specifications
Memory type Installed memory
Main memory (SDRAM) 512 MB
Compact flash 1 GB
Boot flash 4 MB
Data transmission ranges
Table 14 provides the data transmission ranges for different cable types and port
speeds.
Table 14. Data transmission ranges
Port speed Cable size (microns) Short wavelength
(SWL)
Long wavelength
(LWL)
Extended Long
Wavelength (ELWL)
1 Gbps 50 500 m (1,640 ft) N/A N/A
62.5 300 m (984 ft) N/A N/A
9 N/A up to 10 km (6.2 mi) up to 40 km (24.8 mi)
2 GGbps 50 300 m (984 ft) N/A N/A
62.5 150 m (492 ft) N/A N/A
9 N/A 10 km (6.2 miles)
without an Extended
Fabrics license; 50 to
100 km with an
Extended Fabrics
license
up to 40 km (24.8 mi)
4 Gbps 50 150 m (492 ft) N/A N/A
62.5 70 m (230 ft) N/A N/A
9 N/A N/A N/A
8 Gbps 50 150 m (492 ft) N/A N/A
62.5 21 m (69 ft) N/A N/A
9 N/A 10 km N/A
Appendix. Product specifications
37