ADTRAN Cable T1 ESF CSU ACE User Manual page 44

Chapter 3. Operation
6)BIT STUFFING
When enabled, bit stuffing causes the T1 ESF CSU ACE to monitor for ones (1s) density violations
and inserts a one (1) when needed to maintain ones at 12.5 percent. This option should be disabled if
B8ZS is enabled. The factory default is DISABLED.
ENABLED
DISABLED
7)SET LBO
Selects the line build out for the network interface. The factory default is 0 dB.
0 dB
-7.5 dB
-15 dB
-22.5 dB
When interfacing to a Smart jack, the 0 dB setting typically works best because most
Smart jacks expect a strong receive level.
8)NET LB
When enabled, the T1 ESF CSU ACE responds to loopback codes from the network interface. The
factory default is ENABLED.
ENABLED
DISABLED
9) ROB BIT SIG
Enables and disables robbed-bit signaling. This option should be enabled in applications when the
terminal interface (TI) is connected to equipment for voice or dialed data services (PBX/SW56).
When enabled, robbed bit signaling will occur in the user specified DS0s. The DS0s must be
contiguous, and are defined by a starting and ending DS0. The factory default is Disabled.
ENABLE
DISABLE
10) RBS START
When robbed-bit signaling is enabled, enter the first DS0 in which robbed-bit signaling will occur
(1-24). The factory default is 1.
11) RBS END
When robbed-bit signaling is enabled, enter the last DS0 in which robbed-bit signaling will occur (1-
24). The factory default is 24.
44 © 2004 ADTRAN, Inc
T1 ESF CSU ACE User Manual
61204025L1-1B