IBM 2498-B40, Service Information

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Data transmission ranges
Table 13 provides the data transmission ranges for different transceivers, port
speeds, and cable types.
Table 13. Supported optics, speeds, cables, and distances
Transceiver
type
Form factor Speed
Multi-Mode Media Maximum Distance
Single Mode
Media
Maximum
Distance
62.5 microns
(OM1) 50 microns
(OM2) 50 microns
(OM3) 50 microns
(OM4)
9 microns
SWL SFP+ 2 Gbps 150 m (492
ft.) 300 m (984
ft.) 500 m (1640
ft.) N/A N/A
SFP+ 4 Gbps 70 m (229 ft.) 150 m (492
ft.)
380 m (1264
ft.) 400 m (1312
ft.) N/A
SFP+ 8 Gbps 21 m (68 ft.) 50 m (164 ft.) 150 m (492
ft.)
190 m (623
ft.) N/A
SFP+ 10 Gbps 33 m (108 ft.) 82 m (269 ft.) 300 m (984
ft.)
550 m (1804
ft.) N/A
SFP+ 16 Gbps 15 m (49 ft.) 35 m (115 ft.) 100 m (328
ft.)
125 m (410
ft.) N/A
LWL SFP+ 8 Gbps N/A N/A N/A N/A 10 km (6.2
mi.)
SFP+ 10 Gbps N/A N/A N/A N/A 10 km (6.2
mi)
ELW SFP+ 2 Gbps N/A N/A N/A N/A 30 km (18.6
mi)
SFP+ 4 Gbps N/A N/A N/A N/A 30 km (18.6
mi)
SFP+ 8 Gbps N/A N/A N/A N/A 25 km (15.53
mi.)
Up to 7500 km at 2G is supported when using long distance transport system such
as DWDM.
Memory specifications
The switch has three types of memory devices, boot flash, compact flash, and main
memory. The size of each is listed in Table 14.
Table 14. Memory specifications
Memory type Amount
Boot flash 4 MB
Compact flash 1 GB
Main memory (DDR2 SDRAM) 1 GB, 64-bit with 8-bit ECC
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SAN48B-5 Installation, Service, and User Guide