Cabling 16-Port Asynchronous Modules
2-11
CAUTION:
To eliminate cable noise emission in excess of FCC Part 5, and
CISPR22 (EN55022) specifications for Class A devices, the console cable
should be 100% shielded (Inmac
®
braid shielded or equivalent) and have
connectors with metallic backshells. Cable shields should be connected to
backshells.
You can buy these cables directly from 3Com or your network supplier:
■
10-ft (3-m) extension cable (male-male), 3Com part number 3C6270
■
25-ft (8-m) extension cable (male-male), 3Com part number 3C6271
■
50-ft (15-m) extension cable (male-male), 3Com part number 3C6272
Table 2-2 shows other recommended vendors and part numbers.
Octopus (Hydra)
Cable
To connect directly to host, terminals, modems, or other serial devices,
3Com recommends an octopus cable (also known as a hydra cable) that
fans out the 50-pin Telco connector to eight RJ-12 connectors. The other
end of this cable terminates in a 50-pin bottom-entry male connector.
Figure 2-8 shows the octopus cable.
Figure 2-8
Octopus (Hydra) Cable
You can buy this cable directly from 3Com or your network supplier:
■
2-ft (0.6-m) octopus (hydra) cable, 3Com part number 3C6102
3Com also recommends the following vendors and part numbers:
Table 2-2
Extension Cable Vendors and Part Numbers
Vendor
Part Number (PVC)
Part Number (FRD)
Cable Length
Gender of Connectors
MOD-TAP
40-101-11
40-201-11
1 ft (0.3 m)
Male-male
MOD-TAP
40-101-12
40-201-12
1 ft (0.3 m)
Male-female
MOD-TAP
40-110-12
40-210-12
10 ft (3 m)
Male-female
MOD-TAP
40-130-12
40-230-12
30 ft (9 m)
Male-female
MOD-TAP
40-150-12
40-250-12
50 ft (15 m)
Male-female
MOD-TAP
40-100-12
40-200-12
100 ft (30 m)
Male-female
50-pin bottom-entry
male connector
RJ12
connectors
CS3000BookFile Page 11 Tuesday, October 15, 1996 5:12 PM
