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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 VT100 User Guide</TITLE><LINK HREF="vt100-ug.css" TYPE="text/css" REL="stylesheet"><LINK HREF="/favicon.ico" TYPE="image/x-icon" REL="shortcut icon"></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> VT100 User Guide<TABLE WIDTH="100%"><COL SPAN="3" WIDTH="33%"><TBODY><TR><TD ALIGN="LEFT"><A HREF="chapter2.html">Chapter 2</A></TD><TD ALIGN="CENTER"><A HREF="contents.html">Contents</A></TD><TD ALIGN="RIGHT">&nbsp;</TD></TR></TBODY></TABLE><HR></DIV><TABLE ID="T2-1" FRAME="VOID" RULES="GROUPS" CELLSPACING="0"><CAPTION>Table 2-1 EIA RS-232-C Connector Signals</CAPTION><COLGROUP><COL ALIGN="RIGHT"><COL></COLGROUP><COLGROUP><COL ALIGN="RIGHT"><COL></COLGROUP><THEAD><TR VALIGN="BOTTOM"><TH>Pin Number</TH><TH>Description</TH><TH>Pin Number</TH><TH>Description</TH></TR></THEAD><TBODY><TR VALIGN="TOP"><TD>1</TD><TD>Protective ground</TD><TD>14</TD><TD>(not used)</TD></TR><TR VALIGN="TOP"><TD>2</TD><TD>Transmitted data</TD><TD>15</TD><TD>Transmit clock</TD></TR><TR VALIGN="TOP"><TD>3</TD><TD>Received data</TD><TD>16</TD><TD>(not used)</TD></TR><TR VALIGN="TOP"><TD>4</TD><TD>Request to send</TD><TD>17</TD><TD>Receive clock</TD></TR><TR VALIGN="TOP"><TD>5</TD><TD>Clear to send</TD><TD>18</TD><TD>(not used)</TD></TR></TBODY><TBODY><TR VALIGN="TOP"><TD>6</TD><TD>Data set ready</TD><TD ROWSPAN="2">19</TD><TD ROWSPAN="2">Speed select<BR>(secondary request to send)</TD></TR><TR VALIGN="TOP"><TD>7</TD><TD>Signal ground (common return)</TD></TR><TR VALIGN="TOP"><TD>8</TD><TD>Carrier detect</TD><TD>20</TD><TD>Data terminal ready</TD></TR><TR VALIGN="TOP"><TD>9</TD><TD>(not used)</TD><TD>21</TD><TD>(not used)</TD></TR><TR VALIGN="TOP"><TD>10</TD><TD>(not used)</TD><TD>22</TD><TD>Ring indicator</TD></TR></TBODY><TBODY><TR VALIGN="TOP"><TD>11</TD><TD>Same as pin 19</TD><TD>23</TD><TD>Same as pin 19</TD></TR><TR VALIGN="TOP"><TD ROWSPAN="2">12</TD><TD ROWSPAN="2">Speed indicator<BR>(secondary carrier detect)</TD><TD>24</TD><TD>(not used)</TD></TR><TR VALIGN="TOP"><TD>25</TD><TD>(not used)</TD></TR><TR VALIGN="TOP"><TD>13</TD><TD>(not used)</TD><TD></TD><TD></TD></TR></TBODY></TABLE><DIV CLASS="navbar"><HR><TABLE WIDTH="100%"><COL SPAN="3" WIDTH="33%"><TBODY><TR><TD ALIGN="LEFT"><A HREF="chapter2.html">Chapter 2</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/vt100-ug/table2-1.html</DIV></DIV></BODY></HTML>
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