Vanguard 7300 Series, Installation Manual

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2-38 Vanguard 7300 Enclosures and Components
Vanguard 7300 Cards
Serial Transition
Module - Rear View The Serial Rear Transition Module provides eight SSIO connectors:
Figure 2-26. Serial Transition Module Rear View
Serial Transition
Module Pinouts The pinouts for the Serial Card’s SSIO connectors are listed in Appendix B,
Vanguard 7300 Cable Connectors and Pinouts.
Sec-Ext External device provides a
clock to this port and if it is
the highest priority port that
is synchronized, drives
Group Clock External device provides a
clock and if it is the first
highest priority port
synchronized, drives Card
Clock.
Note
Group must be set to Card
Clock for voice connections.
External device provides a
clock and if it is the first
highest priority port
synchronized, drives System
Clock.
Prim-Ext External device provides a
clock to this port and if it is
the highest priority port that
is synchronized, drives
Group Clock. External device provides a
clock and if it is the first
highest priority port
synchronized, drives Card
Clock.
Note
Group must be set to Card
Clock for voice connections.
External device provides a
clock and if it is the first
highest priority port
synchronized, drives System
Clock.
Port Timing Group Clock set to
Group Clock
Group Clock set to Card
Clock
Card Clock set to
System Clock