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Copyright Emulex Corporation - All rights reserved, 1999
access to the GLM, GBIC or 1x9 transceiver optical port is possible. Each Class 1 product shall have affixed an
explanatory label bearing the words:
Alternatively, at the discretion of the manufacturer, the same statement may be included in user information. If a
label is used, an example of the IEC Class 1 information label that is suitable for most European countries is
shown below. The label consists of black printing on a white background. Languages represented on this label
are English, German, Finnish and French, and they represent the minimum set for acceptance of a Class 1
product in most European countries. Refer to IEC 825-1 (1993) for recommended label and border dimensions.
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Product Information
GLM
GBIC
1 x 9 Transceiver
GLM
The optical GLM is a single port communications card. Each communication port consists of a
transmitter and receiver optical subassembly. The transmitter subassembly contains a semiconductor laser
diode of gallium aluminum arsenide (GaAlAs). This material emits in the wavelength range of 770 to 860
nanometers for shortwave and 1270 to 1355 nanometers for long wave, and are commonly referred to as
short wavelength (SW) or long wavelength (LW) lasers. The discrete laser diodes are classified as Class
3B laser products. Once they are incorporated into the GLM, the product’s automatic power control
maintains the average power launched into a fiber at a value below the Class 1 limit.
Note
OFC GLMs are found only on the LP6000. Any
reference to OFC or non-OFC products apples only
to the LP6000, and not to the LP7000/E, LP8000 or
LP850.
For OFC GLMs (Open Fiber Control) the optical fiber link between two GLM ports is continuously
monitored by the open fiber link detection and laser safety control system (OFC). In the event of a break
anywhere in the path, this control system prevents laser emissions from exceeding Class 1 levels. For
