ADTRAN 1202011L1, User Manual

Page: 58 / 162

Chapter 6. Configuring DTE Options
6-4 DSU III AR User Manual 61202011L1-1
For point-to-point operation at 56 kbps with secondary channel, the net-
work requires that the primary and secondary channel data not be all zeros
simultaneously. For HDLC protocol applications, this constraint can be
eliminated by selecting either the
D
ATA
I
NVERT
option or the S
CRAM
-
BLER
O
N
option. The factory default setting is S
CRAMBLER
O
FF
.
For 64 kbps clear channel operation, there is a possibility that the DTE
data sequences might mimic network loop maintenance functions and er-
roneously cause other network elements to activate loopbacks. To prevent
this, the
S
CRAMBLER
O
N
or S
UPPRESS
LBE option should be selected
for both the local and remote DSU III AR.