Hardware Installation Manual
3. Physical Description
MSBR Series
19
Mediant 1000B MSBR
3.2.2
FXO Module
The FXO module provides the Foreign eXchange Office (FXO) interfaces. Up to six 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 24 FXO interfaces (i.e., 6 modules x
4 ports).
Notes:
•
The standard FXO module supports outdoor and indoor (lightning protection) loop-
start signaling. The
FXO G
module supports both loop- and ground-start signaling
(but only supports indoor protection).
•
To enable ground-start signaling, use the
ini
file parameter GroundKeyDetection
(refer to the device's
User's Manual
).
3.2.2.1 Port Description
Each FXO module provides up to four analog RJ-11 ports. The ports are labeled
I
,
II
,
III
,
and
IIII
.
Figure
3-3: FXO Module
3.2.2.2 LED Description
Each FXO port provides a LED for indicating operating status, as described in the table
below:
Table
3-4: 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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