ADTRAN Cable T1 ESF CSU ACE - Manual (Page 33)

Chapter 4. Operation
61202066L1-1B T1 ESF CSU Rackmount User Manual 33
Transmit Performance Report Message
A performance report message (PRM) is a status update sent towards the
network by the T1 ESP CSU RM when in ESP mode. This report is sent in
accordance with ANSI T1.403 and is a summary of the last four seconds
of operation. Enable this option unless instructed otherwise by the carrier.
The PRM is sent when this option is O
N
.
Transmit Line Build Out (network)
Transmit line build out (TX LBO) selects the transmit level of the
outgoing T1 stream. Attenuation of the T1 signal can be added to avoid
overdriving repeaters on the T1 line. A smart jack is installed at the
network demarcation point on most carrier-provided T1 lines and it should
receive a 0 dB signal. If there is no smart jack, the auto line build out
feature may be used. This feature enables the T1 ESP CSU RM to base its
transmit level on the level of the signal received from the network. If
trouble exists with the auto line build out feature, try each of the selections
until achieving reliable operation.
Bit Stuffing
Bit stuffing is an option used to ensure pulse density requirements on
carrier-provided T1 lines in accordance with ANSI T1.403 and AT&T
62411. If B8ZS is enabled, pulse density requirements are already met so
bit stuffing should be
DISABLED
.
Bit stuffing corrupts the user data from the DTE when they
fail to meet the 12.5% 1s density requirement. If the DTE
data do not meet this requirement, select B8Z5.