Functional Description; Three-Port Input Module Indicators - Symmetricom TSG-3800 Series User Manual

Table 5-15 describes the status indicators (LEDs) located on the front panel of the
Three-Port Input module.
Table 5-15. Three-Port Input Module Indicators
Indicator
POWER
REF
MOD FLT
PORT
FAULT PT1
PORT
FAULT PT2
PORT
FAULT PT3

Functional Description

Refer to Figure 5-9
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 Ω (line) or 3.3 kΩ (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 sync quality level (SSM) messages in the FDL channel.
The E1 version accepts 2048 kHz PCM signals in either CAS or CCS format with or
without HDB3 zero suppression. The input circuits provide DC blocking and
transformer isolation for balanced or single-ended AMI signals. The termination is
selectable for 120 ohm (balanced), 75 ohm (single-ended), or 3.3k ohm (bridging)
with a level of +3 dB to –27dBTLO. The module monitors and reports occurrences
of loss of signal (LOS), alarm indicator signal (AIS), loss of frame alignment (LOF),
and bipolar violations (BPV). When set for CAS mode, the CRC4 checking may also
be enabled. The sync quality level message (SSM) in TS0 can be read and
reported, if available.
12778474-002-2 Revision F – March 2004
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Color
GREEN On = Power is applied
GREEN On = The Clock Modules are locked to one of the
references applied to this module.
RED On = A fault condition not related to the input signal exists
on this module.
RED On = A fault condition exists with the input signal on port
ONE of this module.
RED On = A fault condition exists with the input signal on port
TWO of this module.
RED On = A fault condition exists with the input signal on port
THREE of this module.
for the following functional discussion. The T1 version accepts
Input Modules
Three-Port Input Module
Description
TSG-3800 User's Guide 161