Altigen AltiWare OE/ACC Version 5.0, Руководство администратора

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Board Configuration
AltiWare OE System Installation & Administration Manual 6-47
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T1 Clocking
Depending on the configuration of the T1 boards and span for your
AltiServ system(s), the System Clock Master setup should be set
according to the follow conditions:
• If all of the T1 boards are connected to an FXO (Foreign Exchange
Office) or CO, the System Clock Master check box must NOT be
checked for any of the T1 boards.
• If two AltiServ systems are connected back-to-back with a T1 span,
the System Clock Master check box must be checked for only one of
the T1 boards.
• If two T1 boards in the same AltiServ system are connected back-to-
back with a T1 span, the System Clock Master check box must be
checked for the T1 board that has not been designated by the MVIP
setting as the system’s master clock to drive the MVIP bus.
• If four T1 boards are in the same AltiServ system, where each pair is
connected back-to-back with a T1 span:
— The System Clock Master check box must be checked for one of
the T1 boards from the first pair, that has not been designated by the
MVIP setting as the system’s master clock to drive the MVIP bus.
— The other two T1 boards of the second pair must have its System
Clock Master check box unchecked
Important: In all back-to-back cases, the MVIP Clock Configuration
should be set to “Manual,” and the board connected to the
board configured as the back-to-back clock master must be
designated at the MVIP bus master.