Input Modules
Single-Port Input Module
152
TSG-3800 User’s Guide
12778474-002-2 Revision F – March 2004
Table 5-12
describes the status indicators (LEDs) located on the front panel of the
Single-Port Input module.
Functional Description
Refer to
Figure 5-7
for the following functional discussion. The T1 version accepts
DS1 signals in SF (D4) or ESF format with or without B8ZS zero suppression. The
input circuits provide DC blocking and transformer isolation for balanced AMI
signals. The termination is user-selectable for 100 ohm (line) or 3.3k ohm (bridging)
at levels of +3 to –24 dBDSX (line). The module monitors and reports occurrences
of loss of signal (LOS), alarm indicator signal (AIS), out of frame (OOF), and bipolar
violations (BPV). In ESF mode the module also monitors and reports CRC errors,
and the synchronous quality level SSM messages in the FDL channel.
Table 5-12. Single-Port Input Module Indicators
Indicator
Color
Description
POWER
GREEN
On = Power is applied
REF
GREEN
On = The Clock Modules are locked to on of the
references applied to this module
MOD FLT
RED
On = A non-input signal related fault condition exists
on this module
PORT
FAULT PT1
RED
On = A fault condition exists with the input signal on
this module
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