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TC1901
User's Manual
Rev. 1.8
Before unpacking any equipment, inspect all shipping containers for evidence of external damage caused
during transportation. The equipment should also be inspected for damage after it is removed from the
container(s). Claims concerning shipping damage should be made directly to the pertinent shipping agencies.
Any discrepancies should be reported immediately to TC Communications' Customer Service Department.
The TC1901 should be located in an area that provides adequate light, work space, and ventilation. Avoid
locating it next to any equipment that may produce electrical interference or strong magnetic fields, such as
elevator shafts or heavy duty power supplies. As with any electronic equipment, keep the unit from excessive
moisture, heat, vibration, and freezing temperatures.
Each TC1901 unit is powered via a rear panel's terminal block connector. There are two pairs
of terminal block connectors ("PWR A" and "PWR B") for power redundancy, the power
LEDs on the front panel will light according to which power jack(s) is/are connected. The
+ -
power is 12VDC @400mA, (24VDC, -48VDC, 125VDC and AC 115VAC to 230VAC are
(12 VDC) @ 400mA
optional).
The RJ-11 connector uses the middle two pins for Tip and Ring, see page 8 for pin assignments.
DIP switch #1 must be set opposite on the local and remote units, one of the units must be a Master and the
other a Slave. DIP switch #2, set according to your setup for FXS to FXS or FXO to FXS. DIP switch #3,
use to change the ring sound. DIP switch #4, use to disable the alarm. DIP switch #5, use to force "off hook"
condition (for testing only). DIP switches #6, 7, and 8 are for future releases (not used).
When power is first turned on, all the LEDs should be flashing for one second. This allows the user to be
sure all the LEDs are in working condition.
After one minute, the "alarm" LED should be Off, "PWR A" or "PWR B" or both will be On, "VCCA," "OPT,"
" SYNC," and "RSNC" will be On, one of "FXS" or "FXO" LEDs should be on to indicate FXO or FXS setup,
and the "MSTR" LED should be lit on only one of the units. The flashing green LEDs will turn to solid when
abnormal conditions are removed and the red LED (alarm) will be off.
MNL-19010-01-18
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