NetworkInterface.T1E1[x].LineCode

Specifies the ones density maintenance method used on the trunk line to maintain a clear channel transmission.

Syntax

NetworkInterface.T1E1[x].LineCode = code

x = 0..15 (0-based trunk number or range of trunk numbers)

Access

Read/Write

Type

String

Default

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.

For E1 trunks, NetworkInterface.T1E1[x].LineCode defaults to HDB3.

NetworkInterface.T1E1[x].LineCode is optional.

Allowed values

AMI | B8ZS | HDB3 | AMI_ZCS

Example

NetworkInterface.T1E1[0..3].LineCodeCode = AMI

Details

For more information, refer to AMI, ones desity, and zero code suppression.

The valid T1 trunk formats are:

Format	Definition
AMI	Alternate mark inversion - standard line coding with no zero code suppression.
B8ZS	Binary 8-zero code suppression that 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 1001 1000.
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 that uses patterns of bipolar violations to replace sequences of 4 zero data bits to maintain ones density on clear channel transmission.