Hardware manual

linecode
IR-132
Cisco IOS Interface Command Reference
linecode
Use the linecode controller configuration command to select the line-code type for T1 or E1 line.
linecode {ami | b8zs | hdb3}
Syntax Description
Defaults
AMI is the default for T1 lines.
High-density bipolar 3 is the default for E1 lines.
Command Mode
Controller configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
Use this command in configurations where the router or access server must communicate with T1
fractional data lines. The T1 service provider determines which line-code type, either ami or b8zs,
is required for your T1 circuit. Likewise, the E1 service provider determines which line-code type,
either ami or hdb3, is required for your E1 circuit.
Example
The following example specifies B8ZS as the line-code type:
linecode b8zs
ami Specifies alternate mark inversion (AMI) as the line-code type. Valid for T1 or
E1 controllers.
b8zs Specifies B8ZS as the line-code type. Valid for T1 controller only.
hdb3 Specifies high-density bipolar 3 (hdb3) as the line-code type. Valid for E1
controller only.