IBM 990 - Manual (Page 118)

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zSeries 990 Technical Guide
This RPQ card supports Peer mode and Compatibility mode at 1 Gbps only . It extends the
maximum distance of the ISC-3 link to 20 km. For Peer mode, one RPQ Daughter Card is
required at each end of the link between the z990, z900, z890, or z800 servers. For
Compatibility mode, the equivalent G5/G6 server extended distance RPQ Daughter Card is
required on the G5/G6 server end of the link.
Table 3-11 lists the various ISC-3 link characteristics.
Table 3-11 ISC-3 link characteristics
ICB-4 link
The Integrated Cluster Bus-4 (ICB-4) link (feature code 3393) is a member of the family of
Coupling link options available on z990 servers. ICB-4 is a “native” connection used to
connect z990/z890 servers (2084/2086) to z990 servers. An ICB-4 connection consists of
one link that attaches directly to an STI port in the CEC cage, does not require connectivity to
a card in the I/O cage, and operates at 2 GBps. One ICB-4 feature is required for each end of
the link. Each end of the ICB-4 link has a PCHID number.
The ICB-4 cable, feature code 0228, is a unique 10 meter (33 feet) 2.0 GB copper cable to be
used with ICB-4 links only.
ICB-4 cables (FC 0228) are automatically ordered to match the quantity of ICB-4 feature code
3393 on order. Order one cable per connection, not per feature. The quantity of ICB cables
can be reduced, but cannot exceed the quantity of ICB features on order.
ICB-3 link
The Integrated Cluster Bus-3 (ICB-3) link (feature code 0993) is a member of the family of
Coupling Link options available on z990 servers. ICB-3 links are used to connect z900/z800
servers (2064/2066) to z990 servers. There is an STI-3 card that resides in the I/O cage and
provides two ports to support the ICB-3 connections. The STI-3 card converts the 2 GBps
input into two 1 GBps ICB-3s. One ICB-3 feature is required for each end of the link. Each
ICB-3 link at the z990 end has a PCHID number.
The ICB-3 cable (feature code 0227) is a unique 10 meter (33 feet) 1.0 GB copper cable to be
used with ICB-3 links. Existing 10 meter 1.0 GB ICB-3 cables can be reused.
ICB-3 cables (feature code 0227) will be automatically ordered to match the quantity of
ICB-3s (feature code 0993) on order. Order one cable per connection, not per feature. The
quantity of ICB cables can be reduced, but cannot exceed the quantity of ICB features on
order.
ICB-2 link
The Integrated Cluster Bus-2 (ICB-2) link (feature code 0992) is a member of the family of
Coupling Link options available on z990 servers. ICB-2 links are used to connect 9672 G5/G6
to a z990 server. There is an STI-2 card that resides in the I/O cage and provides two output
Mode of
operation IOCP
definition Bandwidth Open Fiber
Control (OFC) Intended
attachment Maximum
distance
Peer CFP 2 Gbps No z990, z900,
z890, or z800 10 km
Compatibility CFS/CFR 1 Gbps Emulation 9672 G5/G6 10 km
Peer with
RPQ 8P2197 CFP 1 Gbps No z990, z900,
z890, or z800 20 km
Compatibility with
RPQ 8P2197 CFS/CFR 1 Gbps Emulation 9672 G5/G6 20 km