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• When an opposite office cannot interface with the ISDN network.
Dial 1234
Calling Party
Example of ISDN-VPN
PBX
0345678910 (Office No.)
1234 (Called Party Subaddress)
ISDN
A
– 10 –
CHAPTER 1 GENERAL INFORMATION
PBX
B
(034567-8910)
Tie Line
1234
Station No. 1234
C
SYSTEM OUTLINE
Called Party
NWA-008852-001 Rev.5.0
98ch1001.fm
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