Figure B-17. Excessive Cascading; Figure B-18. Minimized Cascading - AT&T DEFINITY 2500 series Network Manual

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DIGITAL TRANSMISSION FACILITY
PRIMARY FREQUENCY REFERENCE
SECONDARY (BACKUP) FREQUENCY REFERENCE

Figure B-17. Excessive Cascading

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DIGITAL TRANSMISSION FACILITY
PRIMARY FREQUENCY REFERENCE
SECONDARY (BACKUP) FREQUENCY REFERENCE

Figure B-18. Minimized Cascading

SYNCHRONIZATION OF DIGITAL FACILITIES
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B-25