Version 6.6 13 April 2012
Hardware Installation Manual 3. Physical Description
3.1.1 FXS Module
The FXS module provides the Foreign eXchange Subscriber (FXS) interfaces. Up to two
FXS modules can be installed in the device. Each FXS module can provide up to four FXS
interfaces and therefore, the device can support up to eight FXS interfaces.
3.1.1.1 Port Description
Each FXS module provides up to four RJ-11 ports. The ports are labeled I, II, III, and IIII.
Figure 3-2: FXS Module
3.1.1.2 LED Description
Each FXS port provides a LED for indicating operating status, as described in the table
below:
Table 3-2: FXS Module LED Description
Color State Description
Green
On Phone connected to the port is off-hooked.
Blinking Phone connected to the port rings.
Red
On Error - malfunction in line or out of service due to Serial
Peripheral Interface (SPI) failure.
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