Patton electronic Model 2604 manual Line Coding dsx1LineCoding, Receive Equalizer linkRxEqualizer

17 • T1/E1 Link T1/E1 DACS Administrators’ Reference Guide

•dsx1E1(4)—Based on CCITT/ITU G.704 without CRC

•dsx1E1-CRC(5)—Based on CCITT/ITU G.704 with CRC

Line Coding (dsx1LineCoding)

This variable describes the type of Zero Code Suppression used on the link, which in turn affects a number of its characteristics.

•dsx1JBZS(1)—Jammed Bit Zero Suppression, in which the AT&T specification of at least one pulse every 8 bit periods is literally implemented by forcing a pulse in bit 8 of each channel. Thus, only seven bits per channel, or 1.344 Mbps, is available for data. This feature is not currently implemented.

•dsx1B8ZS (2)—The use of a specified pattern of normal bits and bipolar violations which are used to replace a sequence of eight zero bits.

•dsx1HDB3(3)

•dsx1ZBTSI(4)—May use dsx1ZBTSI, or Zero Byte Time Slot Interchange. This feature is not currently implemented.

•dsx1AMI(5)—Refers to a mode wherein no zero code suppression is present and the line encoding does not solve the problem directly. In this application, the higher layer must provide data which meets or exceeds the pulse density requirements, such as inverting HDLC data.

•other(6)—This feature is not currently supported.

Receive Equalizer (linkRxEqualizer)

This variable determines the equalization used on the received signal. Long haul signals should have the equal- ization set for more. Short haul signals require less equalization.

•linkRxEqualizerOff(1)

•linkRxEqualizerOn(2)

Line Build Out (linkLineBuildOut)

This variable is used in T1 applications to adjust the T1 pulse shape at the cross connect point. Select the pulse strength needed to minimize distortion at the remote T1 receiver end. The default is t1pulse0dB, which should be adequate for most situations.

•triState(0)

•e1pulse(1)

•t1pulse0dB(2)—Strong pulse amplitude.

•t1pulse-7dB(3)—Medium pulse amplitude.

•t1pulse-15dB(4)—Weak pulse amplitude.

Yellow Alarm Format (linkYellowFormat)

This variable identifies which standard will be used to transmit and identify the Yellow Alarm.

•link YellowFormatBit2(1)—Bit-2 equal zero in every channel

•YellowFormatDL(2)—FF00 pattern in the Data Link

124 WAN Circuit Configuration—Modify