TC Communications TC1903, User Manual

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MNL-19030-01-19
POWER A: When lit, a good power source is present at power jack A (rear panel).
POWER B: When lit, a good power source is present at power jack B (rear panel).
VccA: +5V Voltage indicator. This LED should light whenever power is connected to the
unit. It indicates the correct operating voltage is being derived from the power source.
VDC: Not Used.
ALM: Alarm indicator. When lit on Red, there is problem with the incoming optical
signal.
OPT: "On" lit all the time, it indicates that the transmitter is ready to transmit optical power.
SYNC: When lit, it indicates valid optic signal is received. When flashing, it indicates an
invalid optic signal is received. This can happen when the optic receiver is overdrived or
the wrong optic signal is received.
RSNC: Remote Sync; When lit, it indicates "SYNC" LED status at the remote unit's front panel.
When Off, either the remote unit didn't receive good optic signal or local unit didn't
receive optic signal.
FXS: When lit, it indicates the RJ-11 port is set for FXS.
When flashing, it indicates a problem with the FXS module. If the problem persists, call the
Technical Support Department at TC Communications, Inc know about the problem at (949) 852-
1973.
FXO: When lit, it indicates the RJ-11 port is set for FXO.
MSTR: When lit, it indicates the unit is set as the "Master" of the link.
RMTLB: When lit, it indicates the unit's "RMTLB" switch is on. (future release)
RING: When lit or flashing, it indicates the following:
1) When set to FXS, a ring signal is received from the remote unit.
2) When set to FXO, a ring signal is received from the phone line.
HOOK: When lit, it indicates the following:
1) When set to FXS, the local phone is off hook.
2) When set to FXO, the remote unit is off hook.
NOTE: The rest of the LEDs will be for future releases.