Hubbell 69320-101 manual Left

	Pub. 42004-693L2C
Model 69320-101 Voice Network Adapter	Page: 6 of 15

First InternalDIPSwitch (SW4)Settings

NOTE: First internal DIP switch (SW4) changes only take effect after powering down the card rack; resetting the MCU is insufficient.

Position Number

Name

Left	1	ST-Bus Clock Master
	2	T1 Clock Master
	3	T1 Synchronous
	4	E1 Select
	5	Sampling Rate Select
	6	Reserved
	7	Reserved
Right	8	Reserved

Set the ST-Bus Clock Master switch according to the following table:

Open	The VNA generates the Card Rack’s backplane ST-Bus clock signals. The VNA is the ST-
	Bus Clock Master.
Closed	The VNA receives the Card Rack’s backplane ST-Bus clock signals. The VNA is a ST-Bus
	Clock Slave.

Set the T1 Clock Master switch according to the following table:

Open	The VNA uses its received T1 signal’s timing to generate its transmitted T1 signal’s timing.
	The VNA is a T1 Clock Slave.
Closed	The VNA uses the Card Rack’s backplane ST-Bus clock signals to generate its transmitted T1
	signal’s timing. The VNA is the T1 Clock Master.

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