Fiber Driver
EM316E1/EM316T1
Display Information (LED Definition)
•PWR/NMS: illuminates when unit is powered (green color), flashes (green color) when remote or local loop back is enabled by management. The remote loop back feature provides a quick check of the basic functionality of both modems and both fiber optic cable paths. It will send a signal that causes the remote EM316E1/T1 fiber modem to loop its received data and send it back out as its transmitted optical signal, this will cause the loop back indicator to flash (green color)
• | TX: | flashes when Fiber TX is active, (OFF through all zeros transmission) |
• | RX: | flashes when Fiber RX is active |
• | AIS: | Alarm Indication Signal illuminates when unframed |
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| condition is detected, using the detection criteria of less than 9 zeroes |
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| out of 8129 bit periods. |
LOS: | Loss of Signal illuminates when 175 consecutive zeroes have been | |
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| received. LOS return low when the ones density reaches 12.5% |
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| (based upon 175 bit periods starting with a one & containing less than |
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| 100 consecutive zeroes). |
SD: | illuminates when fiber signal is detected |
P/N: | PAGE 8 |
