Functional Description; G.703/13 Output Module Status Indicators - Symmetricom TSG-3800 Series User Manual

Table 7-49 describes the G.703/13 Output module front panel status indicators
(LEDs).
Table 7-49. G.703/13 Output Module Status Indicators
Indicator
Power
Input Fault A
Input Fault B
Output Fault

Functional Description

Refer to Figure 7-24
reference input signals (A and B) from separate Frame Generator Modules. The
module selects and amplifies one signal (normally A). This signal couples to the
output ports through transformers.
If reference signal A fails, the module detects its loss and switches to reference
signal B. The processor can also switch references.
The module checks the outputs to confirm signal presence. Should an output fail,
the front panel OUTPUT FAULT indicator lights.
Newer versions of this module have a switch, S1, located in the lower left corner (as
viewed from the component side, with the edge connector down). This switch
selects between two pairs of reference input signals. In the pressed or "down"
position (default setting), the G.703/13 Output module uses the pair of signals on
the "CLK1" inputs. These are the reference signals used by all versions of this
module. In the "up" position, the "CLK2" inputs are selected. The CLK2 signals are
typically generated by the T1/E1 Frame Generator, 23478305-xxx-0. If this frame
generator is installed, S1 may be set to the "up" position. Otherwise, S1 must be
pressed to select the CLK1 inputs.
12778474-002-2 Revision F – March 2004
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Color
Green On = The module is receiving power.
Amber On = No reference signal applied to input A.
Amber On = No reference signal applied to input B.
Red On = Output failure on one or more channels.
for the following functional discussion. The module accepts two
Output Modules
G.703/13 Output Module
Description
TSG-3800 User's Guide 275