ADTRAN QFO-C Installation And Maintenance Manual

6 Section 61181300L1-5C, Issue 3 61181300L1-5CRelease the card retention lever and carefully seatthe card into the backplane connector by firmlypressing on the QFO-C front panel. Verify thefiber cables move freely between the cable guidesand the shelf.When installed and powered, the PWR LED (green)on the front panel lights steady.OptionsThe QFO-C is software configurable through theSystem Controller Unit (SCU). A comprehensiveguide to all options and configuration information isin the menu sections of this practice.3. OPERATIONThe QFO-C transports up to four T1 signals from thenear (CO/CEV) end to the far Remote Terminal (RT)end via a single mode fiber pair (transmit/receive) thathas an optical budget up to 22 dB. The functions ofthe card are set up through the Total Access SCU via aVT100 type terminal or via the FCD on the SCU frontpanel.The DSX T1 signals are terminated in transformersreflecting a 100 ohm termination. The signal from aDSX channel is monitored for BPV errors and loss ofsignal. Signals up to -9 dBm may be recovered fromthe incoming DSX signal. The T1 signal may bemanually looped back by a VT100 command. Up tofour T1 signals are then multiplexed. The resultingsignal is transmitted to the far end via the lasertransmitter.The received fiber signal is detected via the fiberreceiver and de-multiplexed into four T1 signals.These signals are de-jittered and sent to the DSX bythe T1 line drivers. The line driver circuits providethe appropriate pulse shape for line lengths rangingfrom 0 to 655 feet.The Fiber transceiver provides a minimum launchpower of -8 dBm (optical) and a minimum receivesensitivity of -30 dBm. This supports a minimumoptical budget of 22 dB over a single mode 1310 nmfiber optic cable.Connectors are single or duplex SC type. Thereceiver input level is -3 dBm maximum so thetransmitter may be connected to the receiver withoutoverdriving the receiver input. Optical coding is ANSIX3T9.5.The Fiber transmitter is constantly monitored for “endof life.” If this condition is detected, a minor alarm isgenerated. In a protected system, service is switchedto the auxiliary card and a minor alarm is generated.The QFO-C has a single dip switch (S2), which mustbe set before installing the card in the Total Accesschassis. If the card is used in a non-protected mode oris the main card in a protected mode, set S2-2 toWorking “on” (towards the top to the card). If thecard is used as the auxiliary fiber card in a protectedoperation mode, set S2-2 to “off” (toward the centerof the card). The switch is set in the Working whenreceived from the factory.QFO-C Front Panel IndicatorsThe QFO-C front panel LEDs give statusinformation about the card and are described inFigure 3. Fiber Optic Receiver CablingFiber Optic TransceiverU8XMTRCVS2 WorkingProtectONS2-1 S2-2NOTE: S2-2 set to off = Protect