CHAPTER 2.
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2.3.3 Voice Station Board
This section describes the board that offers the station voice service.
2.3.3.1 8SLI
8SLI (Single Line Interface) board supports 8-port for analog stations.
It interworks with regular phones via the station to provide voice communication.
Main Functions
The main functions of 8SLI voice station board are as follows:
Generating the ring of 20 Hz
Detecting Dial Tone Multi Frequency (DTMF)/dial pulse
Detecting on/off-hook
Generating a tone
Specifications
The specifications of 8SLI/16SLI voice station board are as follows:
8SLI Board: Eight station ports
8SLI Front View
The front view of 8SLI board is shown in the figure below:
Figure 2.8 Front View of 8SLI
The components on the front panel of 8SLI have the functions below:
Table 2.9 Ports and LEDs of 8SLI
Port, LED
Function Description
P1~P8
Station ports of analog phones
P1~P8 LED
The status of Ports
- Off: Not used
- On: Station in use
8SLI
P1
P5
P2
P6
P3
P7
P4
P8
P1
P5
P2
P6
P3
P7
P4
P8