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viii CONTENTS
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The Communication System as a LAN Backup
8-20
PUBLIC AND PRIVATE DATA NETWORK CONNECTIONS 8-21
PUBLIC DATA NETWORKS 8-21
Packet-Switched Public Data Networks 8-21
Circuit-Switched Public Data Networks 8-22
PRIVATE DATA NETWORKS 8-26
Terrestrial Private Data Network Links 8-26
Satellite Private Data Network Links 8-30
TELEMARKETING HOST CONNECTIONS 8-31
THE ISDN GATEWAY 8-31
THE INTEGRATED TELEMARKETING GATEWAY 8-31
DATA NETWORK ADMINISTRATION 8-35
9 9. . D DA AT TA A C CO OM MM MU UN NI IC CA AT TI IO ON NS S C CO ON NF FI IG GU UR RA AT TI IO ON NS S 9 9- -1 1
DSC AND PSC CONNECTIONS 9-2
SNA NODE CONNECTIONS 9-5
CONNECTIONS THROUGH PUBLIC OR PRIVATE DATA NETWORKS 9-6
File Transfers 9-6
Video Teleconferencing 9-6
Image Processing 9-7
FAX Transmittal 9-7
A A. . R RE EL LA AT TE ED D D DO OC CU UM ME EN NT TS S A A- -1 1
B B. . S SY YN NC CH HR RO ON NI IZ ZA AT TI IO ON N O OF F D DI IG GI IT TA AL L F FA AC CI IL LI IT TI IE ES S B B- -1 1
THE NEED FOR SYNCHRONIZATION B-1
SYNCHRONIZATION HIERARCHY B-3
CHANGES TO THE SCS SOFTWARE MADE AVAILABLE VIA SOFTWARE PATCHES B-11
NETWORK SYNCHRONIZATION AND ENGINEERING B-18
AVAILABILITY OF SYNCHRONIZATION SOURCES B-28
CONCLUSIONS ON SYNCHRONIZATION B-29