Chapter 5. Configuration Menu

U-BR1TE

The timing selection U-BR1TE works like NORMAL (CSU) except that timing is derived from the U inter- face on port 1.1.

Set Line Buildout

Selects the line buildout for the network interface. In AUTO mode, the TDU 120e sets the LBO based on the strength of the receive signal and displays the selected value.

Choices: 0.0 dB, 7.5 dB, 15 dB, 22 dB, and Auto.

To activate the -36 dB receiver sensitivity, set the LBO to AUTO. This action is useful in a point-to-point application where no network elements are involved. If a network element such as a Smart Jack is installed on the circuit, the LBO should be set to 0 dB.

Remote Loopback Det

Sets unit to accept or reject the network interface loop-up and loop-down codes as defined in ANSI T1.403.

Choices: ACCEPT ALL, REJECT ATT, REJECT FT1, REJECT

ATT & FT1, REJECT ALL.

Bit Stuffing

When enabled, bit stuffing causes the TDU 120e to moni- tor for ones (1s) density violations and insert a one (1) when needed to maintain 1s at 12.5%.

Choices: ENABLE or DISABLE.

TR-08 Options

The TR-08submenu configures the unit for TR-08 appli- cations. The submenu items and their descriptions fol- low:

Alarm Report

Enables and disables the transmission of alarm reports.

Choices: SEND ALARMS, DISABLE ALARMS

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TDU 120e User Manual

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ADTRAN TDU 120e user manual ATT & FT1, Reject ALL, Alarm Report