IBM z13s Technical Manual page 190

Consideration: FICON Express16S features do not support auto-negotiation to a data link
rate of 2 Gbps.
FICON Express8S
The FICON Express8S feature installs exclusively in the PCIe I/O drawer. Each of the two
independent ports is capable of 2 Gbps, 4 Gbps, or 8 Gbps. The link speed depends on the
capability of the attached switch or device. The link speed is auto-negotiated, point-to-point,
and is transparent to users and applications.
The following types of FICON Express8S optical transceivers are supported:
FICON Express8S 10 km LX feature, FC 0409, with two ports per feature, supporting LC
Duplex connectors
FICON Express8S SX feature, FC 0410, with two ports per feature, supporting LC Duplex
connectors
Each port of the FICON Express8S 10 km LX feature uses an optical transceiver, which
supports an unrepeated distance of 10 km (6.2 miles) by using 9 µm single-mode fiber.
Each port of the FICON Express8S SX feature uses an optical transceiver, which supports up
to 150 m (492 feet) of distance depending on the fiber used.
Statement of Direction: The IBM z13 and z13s servers will be the last z Systems servers
to offer ordering of FICON Express8S channel features. Enterprises that have 2 Gb device
connectivity requirements must carry forward these channels.
All statements regarding IBM plans, directions, and intent are subject to change or
withdrawal without notice. Any reliance on these statements of general direction is at the
relying party's sole risk and will not create liability or obligation for IBM.
FICON Express8
The FICON Express8 feature for z13s servers installs in the I/O drawer (carry-forward only).
Each of the four independent ports is capable of 2 Gbps, 4 Gbps, or 8 Gbps. The link speed
depends on the capability of the attached switch or device. The link speed is auto-negotiated,
point-to-point, and is transparent to users and applications.
The following types of FICON Express8 optical transceivers are supported:
FICON Express8 10 km LX feature, FC 3325, with four ports per feature, supporting LC
Duplex connectors
FICON Express8 SX feature, FC 3326, with four ports per feature, supporting LC Duplex
connectors
Each port of FICON Express8 10 km LX feature uses an optical transceiver, which supports
an unrepeated distance of 10 km (6.2 miles) by using 9 µm single-mode fiber.
Each port of FICON Express8 SX feature uses an optical transceiver, which supports to up to
150 m (492 feet) of distance depending on the fiber used.
FICON enhancements
Together with the FICON Express16S, z13s servers have introduced enhancements for
FICON in both functional and performance aspects.
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IBM z13s Technical Guide