Specifications

64 IBM Power 770 and 780 Technical Overview and Introduction
The cables are also designed to allow the concurrent maintenance of the Power 770 or
Power 780 in case the IBM service representative needs to extract a system enclosure from
the rack. The design of the flexible cables allows each system enclosure to be disconnected
without any impact on the other drawers.
To allow such concurrent maintenance operation, plugging in the SMP Flex cables in the
order of their numbering is extremely important. Each cable is numbered (Figure 2-16).
Figure 2-16 SMP cable installation order
Table 2-15 reports the SMP cable usage for two-enclosure or three-enclosure scenarios.
Table 2-15 SMP cable two and three enclosures scenario
Processor type SMP cables Cable number From
connector
To
connector
Two CEC enclosures
#4983, #4984, #5003,
(0-12 core, 0-16 core)
#3711 1 U1-P3-T1 U2-P3-T1
#3712 2 U1-P3-T4 U2-P3-T4
#EP24 (0-24 core) #3715 1 U1-P3-T1 U2-P3-T1
#3716 4 U1-P3-T2 U3-P3-T2
2 U1-P3-T4 U2-P3-T4
Three CEC enclosures
#4983, #4984, #5003,
(0-12 core, 0-16 core)
#3712 2 U1-P3-T4 U2-P3-T4
#3713 3 U1-P3-T2 U3-P3-T1
4 U2-P3-T2 U3-P3-T2