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