Installation manual

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 se
t to Card
Clock
Card Clock set to
System Clock