Block Diagram Of The Timing Insertion Module - Symmetricom TSG-3800 Series User Manual

Output Modules
Timing Insertion Module
Figure 7-26. Block Diagram of the Timing Insertion Module
The incoming signal is monitored for LOS, OOF, and implicitly AIS conditions. When
one of these is detected, the TIM inserts an AIS signal (re-timed to the system
clock) on the outgoing line. Alternatively, a framed all "ONE's" signal can be sent
under these conditions. This is selected by a jumper block. Receipt of an LOS, AIS,
or OOF signal creates a MAJOR alarm condition.
When buffer slips occur, the TIM indicates this in three ways. A Relay Closure line
on the output connector is toggled for 2.5 seconds. A red SLIP indicator on the front
panel is latched on. An alarm is generated (selectable as MAJOR/ MINOR/
IGNORED by PCB switches). Depressing a front panel switch on the TIM clears the
slip indication and resultant alarm.
12778474-002-2 Revision F – March 2004 TSG-3800 User's Guide 281
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