Panasonic KX-NS1000 Feature Manual page 215

→Main— Extension Number
→Option 7— ISDN Bearer
12.2.1 PBX Configuration—[4-2-1] Extension—Portable Station—Extension Settings—Option 7—
Bearer
Feature Manual References
15.1.17 PRIVATE NETWORK FEATURES—QSIG
Document Version 2016-03
10.1.18 ISDN (INTEGRATED SERVICES DIGITAL NETWORK) FEATURES
ISDN
Feature Manual 215