IBM 990 - Manual (Page 109)

Chapter 3. I/O system structure 97
3.4.3 FICON channel
What follows are the connectivity options in the FICON I/O interface environment.
FICON Express features
There are two types of FICON channel transceivers supported on the z990, a long
wavelength (LX) laser version, and a short wavelength (SX) laser version:
z990 FICON Express LX feature (feature code 2319) with two ports per feature,
supporting LC Duplex connectors
z990 FICON Express SX feature (feature code 2320) with two ports per feature,
supporting LC Duplex connectors
FICON channel features can be installed in the z990 server. The features can be connected
to a FICON-capable control unit, either point-to-point or switched point-to-point, through a
Fibre Channel switch. FICON Express LX (at 1Gbps) can also be connected to the FICON LX
Bridge port feature of an IBM 9032 ESCON Director.
Up to 120 FICON channels (60 features) can be installed in the z990. The model A08 can
have up to 96 FICON channels (48 features), which is limited by the number of STIs available
on model A08 servers.
FICON Express LX feature
The z990 FICON Express LX feature (feature code 2319) occupies one I/O slot in the z990
I/O cage. The feature has two Peripheral Component Interconnect (PCI) cards. Each PCI
card has a single port supporting an LC duplex connector, with one PCHID associated to
each port, and supports link speeds of 1 Gbps or 2 Gbps.
Each port supports attachment to the following:
FICON LX Bridge one port feature of an IBM 9032 ESCON Director at 1Gbps only
Fibre Channel Switch that supports 1 Gbps/2 Gbps Fibre Channel/FICON LX
Control unit that supports 1 Gbps/2 Gbps Fibre Channel/FICON LX
FICON channel in Fibre Channel Protocol (FCP) mode
Each port of the z990 FICON Express LX feature uses a 1300 nanometer (nm) fiber
bandwidth transceiver. The port supports connection to a 9 micron single-mode fiber optic
cable terminated with an LC Duplex connector.
Note: Only FICON Express feature cards are available for FICON connectivity on z990.
FICON channel cards (z900’s feature codes 2315 and 2318), the original pre-FICON
Express cards, are not offered as a new build option and are replaced with new FICON
Express feature cards (feature cards 2319 or 2320) during an upgrade from z900.