Hardware Installation Manual 14 Document #: LTRT-85609
Mediant 600
3.1.2 FXO Module
The FXO module provides the Foreign eXchange Office (FXO) interfaces. Up to two FXO
modules can be installed in the device. Each FXO module can provide up to four FXO
interfaces and therefore, the device can support up to eight FXO interfaces.
3.1.2.1 Port Description
Each FXO module provides up to four RJ-11 ports. The ports are labeled I, II, III, and IIII.
Figure 3-3: FXO Module
3.1.2.2 LED Description
Each FXO port provides a LED for indicating operating status, as described in the table
below:
Table 3-3: FXO Module LED Description
Color State Description
Green
On Off-hooks the line toward the PBX.
Blinking Detects a ring signal from the PBX.
Red
On Error - malfunction in line or out of service due to Serial
Peripheral Interface (SPI) failure.
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