Chapter 1. zSeries 900 overview 11
1.3.5 Parallel Sysplex support
InterSystem Coupling channels
A 4-port ISC-3 card structure is provided on the z900 family of processors. It consists of a
mother card with two daughter cards that have two ports each. Each daughter card is capable
of operating at 1 Gbps in compatibility (sender/receiver) mode or 2 Gbps in peer mode up to
10 km. The mode is selected for each port via CHPID type in the IOCDS.
InterSystem Coupling (ISC-3) channels provide the connectivity required for data sharing
between the coupling facility and the CPCs directly attached to it. ISC-3 channels are
point-to-point connections that require a unique channel definition at each end of the channel.
ISC-3 channels operating in peer mode ...