Use the linecode controller configuration command to select the line-code type for the T1 or E1 line attached to an ISDN Primary Rate Interface (PRI).
linecode {b8zs | hdb3}
Syntax Description
b8zs Binary 8-zero substitution (B8ZS) linecode, used on the T1 line attached to an ISDN Primary Rate Interface (PRI). hdb3 High-density bipolar 3 (HDB3) linecode, used on the E1 line attached to an ISDN Primary Rate Interface (PRI). Command Mode
Controller configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 10.3.
This command is used in configurations where the router is intended to communicate with a channelized T1 or E1 data line.
Example
The following example specifies B8ZS as the line-code type on a channelized T1 line:
linecode b8zs