Gai-tronics 69320-001 Voice Network Adapter (VNA) Manual de usuario descargar pdf (Pagina 6)

Pub. 42004-681L2A

Model 69320-001 Voice Network Adapter Page: 6 of 14

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Internal DIP Switch (SW1) Settings

NOTE: Internal DIP switch (SW1) 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.

Set the T1 Synchronous switch according to the following table:

Open

The VNA is frequency locked to the received T1 signal. This setting is ignored if the VNA is

both a ST-Bus Clock Slave and a T1 Clock Slave.

Closed

The VNA is not frequency locked to the received T1 signal. “Elastic store” buffers in the T1

transceiver integrated circuit either duplicate or drop a frame as needed.

Set the E1 Select switch according to the following table:

Open

The VNA uses T1 signaling.

Closed

The VNA uses E1 signaling. Note: upon initial release of the VNA, this feature does not

function properly.

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Gai-tronics 69320-001 Voice Network Adapter (VNA) Manual de usuario Pagina 6

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