ADTRAN DSU III AR User Manual page 58

Chapter 6. Configuring DTE Options
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
BLER
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
for both the local and remote DSU III AR.
6-4
O option. The factory default setting is S
N
O or S
CRAMBLER N
DSU III AR User Manual
option or the S
I
ATA NVERT
CRAMBLER
LBE option should be selected
UPPRESS
-
CRAM
O .
FF
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