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72 Hardware Maintenance Manual: xSeries 330
Note: For more information about the Advanced System Management PCI adapter
refer to the documentation that came with the adapter.
Connecting the ASM bus
The servers in the Advanced System Management bus are referenced by their
assigned addresses and not their position in the rack.
Complete the following steps to connect the ASM bus:
1. Turn off the servers.
2. Locate the RS-485 ports on the rear of the server and an Ethernet cable with RJ-14
connectors on both ends.
3. Connect one end of the cable to the RS-485 (A) port.
4. Connect the other end of the cable to the RS-485 (B) port on the next server.
5. Repeat steps 3 and 4 to connect up to 12 units together.
Connecting the servers with a C2T chain
To share the same monitor, keyboard, and pointing device with several servers you
must connect the servers together with Cable Chaining Technology (C2T) chaining
cables using the C2T IN and C2T OUT ports.
Before you begin review the following:
• The supported maximum number of servers connected in a single chain with C2T
chaining cables is 42.
• When connecting servers across a gap that is larger than 3U or located on two
separate racks you must use a C2T chaining cable that is 2 meters (6.5 ft.) long,
which is available in the C2T cable option kit.
Note: Only one 2-m (6.5 ft.) long cable can be used in the C2T chain.
• The C2T interconnect cables can be hot-swapped.
Attention: For optimum results, do not touch the chassis with the pins of the C2T
cable connector when hot adding or removing systems from the chain.
• Servers are numbered by their position in the chain (1 through nn). If one server
is removed from the chain, all successive servers are renumbered. For example, if
the twelfth server is removed from a chain of 15 servers, then servers 13 through
15 will then be renumbered to 12 through 14.
RS-485(A)
RS-485(A)
RS-485(A)
RS-485(B)
RS-485(B)
RS-485(B)
E
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h
ernet ca
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with RJ-14 connectors