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PWR
PWR
A
B
+
-
+
This RJ-11 is to be used for the connection of FXS, FXO, or Analog depending on the configuration ordered:
For FXS - Connect to a regular (conventional) 2-wire telephone set. If a hotlink phone line is desired, then
both TC1903s should connect to this "FXS" connector.
For FXO - Use regular phone wire to connect the TC1903 to a dial up phone network such as phone line
from Telco or PBX phone line.
For Analog - When using the analog interface, use this RJ-11 jack to connect your 2 or 4 wire analog signal.
Refer to the pin assignments on page 10.
Note: The 2 or 4 wire analog 600 ohm interface module will depend on which type the customer will
order for their application.
The Dry Contact Relay is normally in the "Open" position. The following conditions will activate the dry
contact relay to "close" status:
1. When there is a Major Alarm (Optic signal is lost). This function can be disabled by setting the
front panel SW1-4 to the "down" position.
The user can use the Dry Contact Relay for an additional function by enabling SW4_3 to the On position
(internal switch#2) on the FXS side unit only. This feature allows the Dry Contact Relay to close and open
as the telephone set rings. The user can use it to connect an additional external device so that the user can
monitor the ringing when they are away from their phone. By using this function, all the LEDs will behave
normal.
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MNL-19030-01-19
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