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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<HTML>
+<HEAD>
+<TITLE>VT100.net: Digital VT102 User Guide</TITLE>
+<LINK HREF="vt102-ug.css" TYPE="text/css" REL="stylesheet">
+</HEAD>
+<BODY>
+<DIV CLASS="navbar"><A HREF="http://vt100.net/"><IMG CLASS="button" SRC="vt100.net-logo.png" ALT="VT100.net" HEIGHT="16" WIDTH="102"></A> VT102 User Guide<TABLE WIDTH="100%">
+<COL SPAN="3" WIDTH="33%">
+<TBODY>
+<TR>
+<TD ALIGN="LEFT"><A HREF="chapter6.html">Chapter 6</A></TD>
+<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD>
+<TD ALIGN="RIGHT">&nbsp;</TD>
+</TR>
+</TBODY>
+</TABLE>
+<HR></DIV>
+<TABLE ID="T6-6" CLASS="majortable" FRAME="VOID" RULES="GROUPS" CELLSPACING="0" CELLPADDING="4" BORDERCOLOR="#ffffff">
+<CAPTION>Table 6-6 Full-Duplex with Modem Control (FDX B) Signals</CAPTION>
+<THEAD>
+<TR VALIGN="BOTTOM">
+<TH>Pin</TH>
+<TH>Name (Mnemonic)</TH>
+<TH>CCITT&nbsp;/ EIA</TH>
+<TH>Switch</TH>
+<TH>Description</TH>
+</TR>
+</THEAD>
+<TBODY>
+<TR VALIGN="TOP">
+<TD>1</TD>
+<TD>Protective ground<BR>(PGND)</TD>
+<TD>101/AA</TD>
+<TD>-</TD>
+<TD>Connects to terminal chassis. Also connects to external ground through third wire of
+power cord.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>2</TD>
+<TD>Transmit data<BR>(TXD)</TD>
+<TD>103/BA</TD>
+<TD>S6</TD>
+<TD>From VT102:<BR>When switch S6 is on (closed), TXD transmits serial characters and
+breaks generated by the terminal. TXD is in mark state when no characters are transmitted.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD COLSPAN="5"><P CLASS="note">NOTE: When S6 is on (closed), switch S7 must be off (open).</P></TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>3</TD>
+<TD>Received data<BR>(RXD)</TD>
+<TD>104/BB</TD>
+<TD>-</TD>
+<TD>To VT102:<BR>RXD receives serial characters from the computer.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>4</TD>
+<TD>Request to send<BR>(RTS)</TD>
+<TD>105/CA</TD>
+<TD>S1</TD>
+<TD>From VT102:<BR>When switch S1 is on (closed), RTS is on if terminal is on-line
+and off if terminal is off-line.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>5</TD>
+<TD>Clear to send<BR>(CTS)</TD>
+<TD>106/CB</TD>
+<TD>S2</TD>
+<TD>To VT102:<BR>When switch S2 is on (closed), CTS indicates when modem is ready to
+transmit data. When on, modem is ready to transmit data and CTS indicator is on. When off,
+modem is not ready to transmit data and CTS indicator is off.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD COLSPAN="5"><P CLASS="note">NOTE: When S2 is on (closed), switch S3 must be off (open).</P></TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>6</TD>
+<TD>Data set ready<BR>(DSR)</TD>
+<TD>107/CC</TD>
+<TD>-</TD>
+<TD>To VT102:<BR>When DSR is on:
+<UL>
+<LI>DSR indicator is on</LI>
+<LI>Modem is connected to a communication line</LI>
+<LI>Modem is ready to use modem control signals.</LI>
+</UL>
+When DSR is off:
+<UL>
+<LI>DSR indicator is off</LI>
+<LI>Terminal performs a disconnect.</LI>
+</UL></TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>7</TD>
+<TD>Signal ground<BR>(SGND)</TD>
+<TD>102/AB</TD>
+<TD>-</TD>
+<TD>SGND is common ground reference potential for all connector signals except protective
+ground. SGND connects to protective ground conductor.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>8</TD>
+<TD>Receive line signal detector<BR>(RLSD)</TD>
+<TD>109/CF</TD>
+<TD>-</TD>
+<TD>To VT102:<BR>Also called carrier detect, RLSD is on when communication line signals
+are good enough to transfer data. When off, the communication line signals are not good
+enough to transfer data; data received is ignored.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>12</TD>
+<TD>Speed indicator<BR>(SI)</TD>
+<TD>112/CI</TD>
+<TD>S4</TD>
+<TD>To VT102:<BR>When switch S4 is on (closed), SI controls terminal transmit and receive
+speeds. When on, transmit and receive speeds are 1200 baud regardless of modem transmit
+and receive speed SET-UP feature selections. When off, transmit and receive speeds are
+modem transmit and receive speed SET-UP feature selections.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>20</TD>
+<TD>Data terminal ready<BR>(DTR)</TD>
+<TD>108.2/CD</TD>
+<TD>-</TD>
+<TD>From VT102:<BR>DTR is on when the terminal is on-line and off when the terminal is
+off-line or performing a disconnect. When on, the modem usually can answer calls
+(modem auto answer option). When off, modem usually disconnects and does not
+answer calls.</TD>
+</TR>
+<TR VALIGN="TOP">
+<TD>23</TD>
+<TD>Speed select<BR>(SPSD)</TD>
+<TD>111/CH</TD>
+<TD>S10</TD>
+<TD>From VT102:<BR>SPSD is on when receive speed SET-UP feature selection is greater
+than 600 baud. SPSD is off when speed is 600 baud or less.</TD>
+</TR>
+</TBODY>
+</TABLE>
+<DIV CLASS="navbar"><HR>
+<TABLE WIDTH="100%">
+<COL SPAN="3" WIDTH="33%">
+<TBODY>
+<TR>
+<TD ALIGN="LEFT"><A HREF="chapter6.html">Chapter 6</A></TD>
+<TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD>
+<TD ALIGN="RIGHT">&nbsp;</TD>
+</TR>
+</TBODY>
+</TABLE>
+<DIV CLASS="navbot">http://vt100.net/docs/vt102-ug/table6-6.html</DIV></DIV>
+</BODY>
+</HTML>