3Com CM 4000 Switch User Manual


 
Hardware Installation
2−4 CM 4000 Installation and Operating Manual
CC 2010 Matrix (Crosspoint Bus) Cable
The CC 2010 cable is used to connect the CM 4000 to the switcher Crosspoint Bus. Depending on the size of the switcher,
this bus may require intermediate buffering through the CB 3000 Control Buffer. See Figure 2−3.
The CC 2010 is a 10−conductor (plus ground) cable. The following ready−made cables, with installed 15−pin D male connec-
tors, are available from Grass Valley:
Length
Part. No.
1 foot (0.3 m) 01−048592−001
2 feet (0.6 m) 01−048592−002
3 feet (0.9 m) 01−048592−003
10 feet (3 m) 01−048592−010
25 feet (7.6 m) 01−048592−025
50 feet (15.2 m) 01−048592−050
100 feet (30 m) 01−048592−100
Figure 2−4.
All rear−panel Crosspoint Bus connectors are 15−pin D, female. For Concerto and Trinix applications, the crosspoint bus must
be terminated at the point farthest from the control processor using a Crosspoint Bus Terminator, part number
01−053050−001. For other routers, no termination is required.
For specific wiring instructions concerning CC 2010 Crosspoint Bus Cables, please refer to the installation diagrams supplied
with your switcher.
For those who wish to prepare their own cables, pin−outs are shown in Figure 2−5. The cable itself should be Belden 9505
or equivalent. Steps should be taken to shield the connectors, e.g., using EMI housings or ferrite cores. Details concerning
ferrite cores are given in Figure 2−7.