AT&T DEFINITY 7200 series - Manual (Page 4)

iv CONTENTS
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MULTIPLEXING OUTSIDE THE SWITCH 1-29
Multiplexing onto T1 Trunks
1-29
Compressing the Signal
1-31
Altering Channel Assignments on T1 Trunks
1-31
Getting the Signal Ready for the Central Office
1-31
Changing the Transmission Medium from Metallic to Fiber-Optic 1-32
Multiplexing with Microwave 1-32
Demultiplexing 1-32
STATISTICAL MULTIPLEXING 1-34
TRUNKING 1-35
APPLICATION 1-35
Local Exchange Trunks 1-35
Tie Trunks 1-36
Special-Access Trunks 1-37
Auxiliary Trunks 1-37
Miscellaneous Trunks 1-37
CONNECTIVITY 1-38
ADMINISTRATION OPTIONS 1-39
System 85/G2 Administration 1-39
System 75/G1 Administration
1-41
DS1 Options
1-41
INTERFACE CIRCUIT
1-42
TRUNK TABLES 1-42
2 2. . C CO OM MM MU UN NI IC CA AT TI IO ON N S SY YS ST TE EM M N NE ET TW WO OR RK KI IN NG G — — A AN N O OV VE ER RV VI IE EW W 2 2- -1 1
TYPES OF NETWORKS 2-2
NETWORK EVOLUTION 2-3
SOFTWARE CAPABILITIES 2-4
Basic Networking Software 2-4
Main-Satellite/Tributary Software — The UDP and Multipremises Packages 2-5
Electronic Tandem Network Software — The PNA and ETN (Standard Network) Packages 2-6
Distributed Communications System 2-7
NETWORK CALL PROCESSING 2-7