958-000289-003, March 2005)

Overview20

laser transceivers that comply with Section 21 of the Code of Federal Regulations (CFR), Subpart J

as of the date of manufacture.

Depending on device connections, G_Ports work as follows:

• If the G_Port is attached to a Fibre Channel device, the port functions as a fabric port (F_Port).

An F_Port is the interface on a director that connects to a device N_Port.

• If the G_Port is attached to another director to form an Interswitch Link (ISL), the port functions as

an expansion port (E_Port). A multi-switch fabric is formed through multiple directors and ISLs.

Figure 2 shows the faceplate of an UPM.

Figure 2 UPM card LEDs and connectors

Single-mode or multi-mode fiber-optic cables attach to UPM cards through small form factor

pluggable (SFP) optic transceivers. The fiber-optic transceivers provide duplex connectors, and can

be detached from UPM cards (through a 10-pin interface) for easy replacement. Three fiber-optic

transceiver types are available:

• Short-wave laser—Short-wave laser transceivers provide connections for transferring data over

short distances (2 to 500 meters) through 50-µm (500 meters) or 62.5-µm (200 meters)

multi-mode fiber.

NOTE: HP recommends 50-µm fiber-optic cable for any new installation requiring multi-mode fiber.

• Long-wave laser—Long-wave laser transceivers provide connections for transferring data over

long distances (up to 10 kilometers) through 9-µm single-mode fiber.

1 Card LED

2 Port LEDs

3 Port connectors

(G_Ports)

UPM

SHR-