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NetworkInterface.T1E1[x].LineCode
Syntax
NetworkInterface.T1E1[
x
].LineCode =
line_code
x
=
0 | 1 | 2 | 3
Access
Read/Write
Type
String
Default
For T1 trunks, default is
B8ZS
.
For E1 trunks, default is
HDB3
.
Allowed Values
AMI | B8ZS | HDB3 | AMI_ZCS | AMI_BELL | AMI_DDS | AMI_GTE
Example
NetworkInterface.T1E1[0..3].LineCode = AMI
Description
Specifies the ones density maintenance method used on the trunk line. (For more information about ones density, refer to
Appendix C
.)
The valid T1 trunk formats are:
Format
Definition
AMI
Alternate mark inversion. Standard line coding with no zero code suppression
B8ZS
Binary 8-zero suppression (uses patterns of bipolar violations to replace zero data bytes). Especially useful for clear channel transmission.
AMI_ZCS
AMI
with jammed bit 7 zero code suppression. For T1 trunks,
NetworkInterface.T1E1[x].LineCode
defaults to
AMI_ZCS
if
NetworkInterface.T1E1[x].SignalingType
is set to
CAS
. Otherwise, it defaults to
B8ZS
.
AMI_BELL
Same as
AMI_ZCS
.
AMI_DDS
AMI
with zero data byte replaced with 10011000.
AMI_GTE
AMI
with "jammed bit 8" zero code suppression, except in signaling frames when "jammed bit 7" is used if the signaling bit is zero.
The valid E1 trunk formats are:
Format
Definition
AMI
Alternate mark inversion. Standard line coding with no zero code suppression
HDB3
High density bipolar 3 code. Uses patterns of bipolar violations to replace sequences of 4 zero data bits in order to maintain 1's density on clear channel transmission
See Also
NetworkInterface.T1E1[x].FrameType
,
NetworkInterface.T1E1[x].Type
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