AT&T MERLIN LEGEND Release 2.0 Programming Summary Manual page 130

PRI Facilities
NOTE:
If you are adding PRI Facilities to an existing system, do not start these
procedures until you have checked the following:
Type of DS1 Facility must be set to PRI.
Frame Format must be specified correctly.
Zero Code Suppression must be specified correctly.
Your system will not operate properly if these values are not correctly set.
To inspector change these values, see Chapter 5.
If you are using ARS in connection with PRI, make sure you select voice, data,
or voice and data as appropriate when you perform the ARS "Voice and/or
Data Routing" procedure under Automatic Route Selection section.
8-2
PRI Facilities