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3.1.6 Automatic Laser Shutdown
Automatic Laser Shutdown (ALS) is a technique used to automatically shut down the output power of the transceiver in case of fiber breakage,
according to ITU-T G.664. If a fiber is cut, the receiver will detect a Loss Of Signal (LOS). The ALS agent will turn off the transmit laser. The
receiver at the far end will then detect an LOS and its ALS agent will turn off its transmit laser. In this way the entire fiber will go dark. The
protocol will also occasionally turn on the laser briefly, monitoring a link for recovery. This on/off period is configurable.
{ Automatic Laser Shutdown }
<1> Mode [Disable]
<2> Period ON [1.0 sec]
<3> Period OFF [3.0 sec]
<1> Mode: Select to enable or disable ALS.
<2> Period ON: Set the period, in seconds (1~5), that turns the laser on to attempt a link recovery. Default is 1 second.
<3> Period OFF: Sets how long, in seconds (1~5), the laser remains off after a failed recovery attempt. Default is 3 seconds.
3.1.7 Ports
The FIBER and LAN port settings for speed, duplex, flow control (802.3x), Link Fault Pass Through (LFPT) and Jumbo Frames (16KB)
support. In addition, the SFP and ports statistics can be viewed by selecting the appropriate menu item.
{ Ports }
Link Speed
LAN [ Up ][1Gfdx]
FIBER [ Up ][1Gfdx]
<1> FIBER Speed [Auto]
<2> FIBER Flow Control [Disable]
<3> LAN Speed [Auto]
<4> LAN Flow Control [Disable]
<5> LFPT [Disable]
<6> Jumbo Frame [Disable]
<7> SFP Status
<8> Detailed Statistics
<1> Fiber Speed: Sets up the Fiber port speed or sets in auto-detect mode. (fdx= full duplex) The SFP must support the selected speed.
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<0> Disable <4> 100fdx <5> 1Gfdx <6> Auto <ESC> Exit
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