The DS2182A T1 line monitor chip is a monolithic CMOS device designed to monitor real-time performance on T1 lines. The DS2182A frames to the data on the line, counts errors, and supplies detailed information about the status and condition of the line. Large on-board counters allow the accumulation of errors for extended periods, which permits a single CPU to monitor many T1 lines. Output clocks that are synchronized to the incoming data stream are provided for easy extraction of S-bits, FDL bits, signaling bits, and channel data. The DS2182A meets the requirements of ANSI T1.231.
Key Features
Performs Framing and Monitoring Functions
Supports Superframe and Extended Superframe Formats
Four On-Board Error Counters:
16-Bit Bipolar Violation
8-Bit CRC
8-Bit OOF
8-Bit Frame Bit Error
Indication of the Following:
Yellow and Blue Alarms
Incoming B8ZS Codewords
8 and 16 Zero Strings
Change-of-Frame Alignment
Loss of Sync
Carrier Loss
Simple Serial Interface Used for Configuration, Control, and Status Monitoring
Burst Mode Allows Quick Access to Counters for Status Updates
Automatic Counter Reset Feature
Single 5V Supply; Low-Power CMOS Technology
Available in 28-Pin DIP and 28-Pin PLCC
Upward-Compatible from the Original DS2182
The DS2182A includes the following changes from the original DS2182:
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