Product Information
GLM
GBIC
1 x 9 Transceiver
Small Form Factor 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 applies only to the LP6000, and
not to the LP7000E, LP8000, LP850 or LP9000.
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 non−OFC links, the optical power from the laser
transmitter is controlled and maintained at a lower power level. The
power emitted from either an open fiber or open laser transmitter is
guaranteed to be below the Class 1 limit. Class 1 laser products are not
considered hazardous. No user maintenance, service operations or
adjustments can be performed on any GLM accessory.
GBIC
The optical GBIC is an integrated duplex data link for bi−directional
communications over multimode or single mode optical fiber. Each
GBIC consists of a transmitter and receiver optical subassembly. The
transmitter subassembly contains a semiconductor laser emitting in the
wavelength range of 770 to 860 nanometers for shortwave length GBICs
and 1270 to 1355 nanometers for long wavelength GBICs. For non−OFC
links, the optical power from the laser transmitter is controlled and
maintained at a lower power level. The power emitted from either an
open fiber or open laser transmitter is guaranteed to be below the Class 1
limit. Class 1 laser products are not considered hazardous. No user
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