ADTRAN TDU 120e ACO Switch, Remote LED, Craft Port, Network Monitor Jack, DS1 Monitor Jack

Models: TDU 120e

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Chapter 3. Operation

ACO Switch

The Alarm Cut-Off (ACO) switch deactivates the alarm relay after an alarm condition has occurred. If the alarm that activated the alarm relay is cleared, then reoccurs, the alarm relay will re-energize.

Remote LED

The remote LED (yellow) indicates a management session (terminal mode or Telnet) is active. The LED does not ac- tivate (turn on) during SNMP sessions.

Craft Port

The Craft Port is used as an RJ-45 port to connect the unit to a computer, a modem, or to another TDU/TSU multiplexor or a TSU 100.

Network Monitor Jack

This jack connects the unit to the network.

DS1 Monitor Jack

This jack connects the unit to a PBX or other terminal equipment.

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TDU 120e User Manual

61202156L2

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ADTRAN TDU 120e user manual ACO Switch, Remote LED, Craft Port, Network Monitor Jack, DS1 Monitor Jack