Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Circuit Pack Descriptions
Issue 3 June 2001
7-33
Control Functions 7
The major control functions of the DS1 circuit pack are as follows:
■ Protection switching for MXRVO/STS1E circuit pack protection
■ VT path overhead processing
■ Internal fault detection
■ Inventory information ( CLEI code, date of manufacture, etc.).
Maintenance Signal Functions 7
The major maintenance signal functions are as follows:
■ Detects VT path AIS
■ Inserts DS1 AIS toward fiber and toward DSX-1
■ Inserts and detects VT path yellow signal.
BBF3/BBF3B DS1PM Circuit Pack Description 7
Purpose of Circuit 7
The DS1PM circuit pack provides all of the functions of a BBF1B circuit pack and
also provides performance monitoring (PM) of SF and ESF signals to allow for T1
tariff verification. For PM, the DS1 signals from the DSX are monitored; PM data
from the opposite direction is provided by accessing the ESF data link. The new
BBF3B has the additional capability of allowing single DS1 facility loopbacks.
DS1PM Faceplate Indicator 7
The DS1PM circuit pack FAULT indicator is shown in Figure 7-12. This red FAULT
LED is lit by the SYSCTL on detection of a DS1PM circuit pack failure. In the
event of an incoming signal failure, this LED flashes on and off.

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English