ADTRAN TSU 120, User Manual

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Chapter 3. Operation
61200.129L1-1 TSU 120 User Manual
63
YEL ALARM
Enables and disables the transmitting of yellow
alarms.
Choices: ENA, DISA
XMIT PRM
Enables and disables the sending of PRM data on the
facility data link (FDL). The PRM data continues to be
collected even if XMIT PRM is disabled (possible only
with ESF Format).
Choices: Off, On
TIMING MODE
Selects the clock source for transmission toward the
network from the NI.
Choices: Network, Base DTE, Base DSX-1,
Internal, Secondary (SI), and Normal
(CSU)
Base DTE, Base DSX-1, and Internal are available only if
no secondary interface is installed.
SET LBO
Selects the line build out for the network interface. In
AUTO mode, the TSU 120 sets the LBO based on the
strength of the receive signal and displays the selected
value.
Choices: 0 dB, 7.5 dB, 15 dB, 22 dB, Auto
INBAND LPBCK
Sets unit to accept or reject the in-band loop up and
loop down codes as defined in ANSI T1.403. This is a
line loopback.
Choices: Accept, Reject
BIT STUFFING
When enabled, bit stuffing causes the TSU 120 to
monitor for ones (1s) density violations and insert a
one (1) when needed to maintain ones at 12.5 %.
Choices: Enable, Disable