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An FXO/FXS Interface Unit (OSU) board provides 12 Foreign Exchange Subscriber (FXS) ports and 12 Foreign Exchange Office (FXO) ports.
Main Functions
An OSU board connects to a POTS telephone or an analog trunk.
Supports hot swap.
Panel
Figure 1 shows the panel of the OSU board.
Figure 1 OSU panel
1 |
Indicator |
2 |
Reset button |
3 |
Console port |
4 |
FXO/FXS port |
5 |
Wrench |
- |
- |
Panel Components
Panel Component |
Identifier |
Description |
Ports |
FXS 1-12 |
FXS ports for connecting the device to a maximum of 12 analog phones. The port supports a DB68B connector. |
FXO 1-12 |
FXO ports for connecting the device to a maximum of 12 analog trunks. The port supports a DB68B connector. |
|
CONSOLE |
The debugging serial port. |
|
Indicators |
PWR |
Power indicator (green), which indicates the power status. ϒ⁄Steady on: Power is supplied. ϒ⁄Off: No power is supplied or the board is faulty. |
RUN |
Running indicator (green), which indicates the running status of the board. ϒ⁄Blinking (0.5 Hz): The board is running normally and no conversation exits. ϒ⁄Blinking (1 Hz): The board is being started. ϒ⁄Steady on: The board is incorrectly installed or faulty. ϒ⁄Off: No power is supplied or the board is faulty. |
|
ALM |
Alarm indicator (red), which indicates the alarm status of the board. ϒ⁄Steady on: The communication is abnormal or the board is incorrectly installed or faulty. ϒ⁄Off: The board is running normally. |
|
Buttons |
RST |
Press to restart the board. NOTICE: Do not press the RST button unless required. The board restarts when you press the RST button, which causes service interruption. |
Parent Topic: Board