CHAPTER 6 NDA-24305
Page 21 4
Revision 1.0
VIRTUAL TIE LINE
V-18 VIRTUAL TIE LINE
1. General Description
This service feature provides the virtual tie line service by setting up a connection between a PBX and another
via ISDN network during the designated period of time.
While the virtual tie line is set, one of the B-channels on the setup connection is used as a CCIS No. 7 signal
channel and other B-channels as CCIS No. 7 voice channels.
<Structure of Virtual Tie Line >
PBX
PRT
ISDN
B-ch
B-ch
B-ch
D-ch
CCH
PBX
PRT
CCH
Virtual Tie Line ( 6B x n)
D-ch