AN2731| Application Note
Maxim/Dallas > App Notes > TELECOM Keywords: programming SLC-96, SLC96, D4, signaling, framing, SLC-96
Sep 19, 2003
APPLICATION NOTE 2731
DS2155, DS21Q55, DS2156 Programming SLC-96
Abstract: This application note provides a detailed description for using the SLC-96 multiframe in the DS2155, DS21Q55, and DS2156. Register values and an example flowchart for software routines allow the user to quickly implement SLC-96 into the application.
Introduction
This application note applies to the following products. T1/E1 SCTs DS2155 DS21Q55 DS2156 In a SLC-96-based transmission scheme, the standard Fs-bit pattern is robbed to make room for a set of message fields. The SLC-96 multiframe is made up of six D4 superframes, so it is 72 frames long. In the 72frame SLC-96 multiframe, 36 of the framing bits are the normal Ft pattern and the other 36 bits are divided into alarm, maintenance, spoiler, and concentrator bits, as well as 12 bits of the normal Fs pattern. Please see the Bellcore document TR-TSY-000008 for more details about SLC-96.
Receive-Side SLC-96 Applications
To enable the DS2155 or DS21Q55 to synchronize onto a SLC-96 pattern, the following configuration should be used:
-
Set to D4 framing mode
T1RCR2.6 = 0
-
Set to cross-couple Ft and Fs bits
T1RCR1.3 = 1
-
Set to minimum sync time
T1RCR1.2 = 0
AN2731 Application Note maxim Download PDF
Add this permalink to your bookmarks for future download of AN2731 ApplicationNote
Permalink: http://application.emcelettronica.com/maxim/AN2731
