herunterladen
Maxim > Design Support > Technical Documents > Application Notes > T/E Carrier and Packetized > APP 337
Keywords: ANSI T1.231?E993, digital hierarchy, layer 1 in-service digital, transmission performance
monitor, DS2151, DS2152, DS21352, DS21552, DS2155
APPLICATION NOTE 337
DS2151 Implementation of ANSI T1.231-1993
Aug 10, 2001
Abstract: Application note on the DS2151 implementation of the key performance indicators that are
required by ANSI T1.231-1993, entitled “Digital Hierarchy - Layer 1 In-Service Digital Transmission
Performance Monitoring." Also included is a table listing all of important parameters and where they are
located within the DS2151 single chip transceiver (SCT).
Overview
The DS2151, DS2152, DS21352, DS21552 and DS2155 single-chip transceivers incorporate all the key
performance indications that are required by ANSI T1.231-1997 (originally dated 1993), entitled "Digital
Hierarchy–Layer 1 In-Service Digital Transmission Performance Monitoring."
Table 1 lists all important parameters and where they are located within the DS2151, DS2152, DS21352,
DS21552, and DS2155. These T1 transceivers do the raw collection of the data. The devices rely on the
external host to accumulate the parameters and create the higher order statistics such as errored
seconds, severely errored seconds, LOS seconds, and so on. The one-second timer within these T1
transceivers is ideal for timing these higher order statistics.
Page 1 of 5
