FS FMT Modules d'Infrastructure Guide De Démarrage Rapide page 7

The Main Working Parameters
(1) Working Mode
Normal Mode: Used for conversion of ber mode and wavelength and regeneration of optical signal.
The optical transceivers must be used in pairs under normal mode. For example, optical signal enters
R of optical transceiver A1 and then comes out from T of transceiver A2; optical signal enters R of
optical transceiver A2 and then comes out from T of transceiver A1.
OEO card has A, B, C and D four groups. The working mode of each group is always the same, but the
working mode of di erent groups can be di erent.
Loopback Mode: Used for detection and troubleshooting
The optical transceiver must be used alone under loopback mode. For example, optical signal enters
R of optical transceiver A1 and comes out from T of transceiver A1.
OEO card has four groups. They are A, B, C and D. The working mode of each group is always the
same. And the working mode of di erent groups also can be di erent.
(2) Optical Transceiver Transmission Control
Open: Optical transceiver always transmits signal;
Close: Optical transceiver does not transmit signal;
Auto: Optical transceiver transmits signal when it receives ber signal normally.
1. When AUTO light control comes with general working mode, optical transceiver A2 transmits
signal only when optical transceiver A1 receives signal normally and optical transceiver A1 transmits
signal only when optical transceiver A2 receives signal normally.
2. When AUTO light control comes with loopback working mode, optical transceiver A1 transmits
signal only when optical transceiver A1 receives signal normally.
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