HGLM-1063

The HGLM-1063 Gigabaud Optical Link Module, provides a complete Fibre Channel FC-0 layer solution. The module meets the requirements of the 100-M5- SL-I physical link as defined by the American National Standards Institute (ANSI) X3.230-1994 Fibre Channel standard. The HGLM-1063 is also compatible with the Fibre Channel Systems Initiative (FCSI) document #FCSI-301-Rev 1.0 "Gigabaud Optical Link Module" specification.

The HGLM-1063 transmits and receives 8b/10b encoded, parallel, data in the 20 bit wide format defined by the FCSI-301 document. The 20 bit wide data is transmitted at 100MB/sec over a serial fiber link and has the capability to receive data at 100 MB/sec simultaneously. With overhead, this translates to a serial line rate of 1062.5 MBaud transmitting and 1062.5 MBaud receiving. The serial data link uses a 780 nm laser transmitter and photodiode. The optimum fiber is 50/125 mm multimode fiber (62.5/125 mm multimode fiber can be used with degraded performance) and attaches to the HGLM-1063 via a duplex SC connector.

As specified in the Fibre Channel Standard, the HGLM-1063 is a Class 1 laser safe device; the transmitted optical signal shuts down in the case of an open fiber condition after a specific time interval. The HGLM-1063 accomplishes this by monitoring the transmitted optical power levels, and the received optical signal.

The HGLM-1063 is intended for use in building adapter cards (or equivalent devices) as shown in Figure 1. The HGLM-1063 provides complete FC-0 functionality. It  provides the FC-1 through FC-4 functions and interfaces directly to the HGLM- 1063. Finally, a bus gasket is used to connect the HPFC-5000 to the specific system bus in use. This block diagram is meant only to illustrate the basic Fibre Channel functionality.

For proper operation, it is necessary to connect the HGLM-1063 to another product (or equivalent) in a full duplex configuration as depicted in Figure 3. This ensures proper operation of the Open Fiber Control circuitry and allows proper link startup and synchronization.