Download Configuration Guide

Configuring ISDN PRI Settings
Setting the Encoding Method
This command sets the encoding method used with T1 and E1 lines. Table 11-8 explains
the encoding method options.
Command> set Line0 encoding b8zs|ami|hdb3
Table 11-8
Encoding Method Options
Option
Description
Line0
Line0 or Line1.
b8zs
Bipolar 8-zero substitution. This is the default for T1 lines.
ami
Alternate mark inversion.
hdb3
High-density bipolar 3. This is the default for E1 lines.
Setting the Pulse Code Modulation
You need to set the pulse code modulation only if you are using digital modems and
your PRI service provider instructs you to change the setting to something other than
the default. This command sets the method for compressing and expanding, or
companding, digitized audio signals.
To set the pulse code modulation, use the following command. Table 11-9 explains the
pulse code modulation options.
Command> set Line0 pcm u-law|a-law
Table 11-9
Pulse Code Modulation Options
Option
Description
Line0
Line0 or Line1.
u-law
Default method for T1 PRI lines.
a-law
Default method for E1 PRI lines.
Configuring the PortMaster 3
11-7