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- Path: netnews.worldnet.att.net!newsadm
- From: Dennis Cardone <den@worldnet.att.net>
- Newsgroups: comp.dcom.modems
- Subject: What is ROM
- Date: Sun, 21 Apr 1996 09:35:27 -0700
- Organization: AT&T WorldNet Services
- Message-ID: <317A63CF.19C6@worldnet.att.net>
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- I got at http://www.shiva.com/prod/ccl/us62.html this modem string
- (see attachment)
- its says to use "rom sv1554" Hoe do I do that?
- --
- den@worldnet.att.net
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- Enjoy Life
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- <HTML><!-- doctype doc --><!-- TILE 2.5 beta 1 --><TITLE>[US Robotics Sportster 28.8-33.6]</TITLE><!-- hstart --><pre> <A HREF = "viewlist.html"><IMG SRC = "views.gif" BORDER=0 ALT=" [Home] " ALIGN=MIDDLE></a><A HREF = "help.html"><IMG SRC = "help.gif" BORDER=0 ALT=" [Help] " ALIGN=MIDDLE></A><A HREF = "about.html"><IMG SRC = "about.gif" BORDER=0 ALT=" [About] " ALIGN=MIDDLE></A><A HREF = "info.html"><IMG SRC = "info.gif" BORDER=0 ALT=" [Info] " ALIGN=MIDDLE></A></pre>
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- <!-- hend --><P>
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- <H2><CENTER>[US Robotics Sportster 28.8-33.6]</CENTER><P>
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- <BR>
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- </H2><TABLE BORDER=1 CELLPADDING=5 CELLSPACING=1><TD VALIGN=TOP>
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- <U>Last Modified</U> <BR>
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- 02/15/96</TD><TD VALIGN=TOP>
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- <U>Region</U><BR>
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- U.S.</TD></TR><TR><TD VALIGN=TOP>
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- <U>Confirmation Status</U> <BR>
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- PC Dial-In ARA 2.x</TD><TD VALIGN=TOP>
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- <U>Also available in:</U> <BR>
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- MODEMS.INI MODEMS.SNM<BR>
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- </TD></TR></TABLE><P>
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- [US Robotics Sportster 28.8-33.6]<BR>
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- InitString=AT&F1&B1&D2&H1&I0&K1&M4S13=1S27=48<BR>
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- AnswerInit=AT&F1&B1&D2&H1&I0&K1&M4S13=1S27=48S0=1&W<BR>
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- BPSRate=115200<BR>
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- FlowControl=Hardware <P>
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- <U>Notes</U><BR>
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- 1-This string was originally written for the 28.8 Sportster, but it can also be used for a new variant of the Sportster 28.8 <BR>
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- that supports speeds up to 33.6.<P>
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- 2- US Robotics Sportster may have problems connecting to the NetModem 28.8 or LanRover's<BR>
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- with the V.34 internal modems or other V.34 modems connected to them.<P>
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- <U><B>Solution:</B></U><P>
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- US Robotics has a new ROM and modem string that will correct this problem.<P>
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- The ROM version that you should use is SV 1554. The ROM version can be found with the ATI1<BR>
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- command. ROM version 32B8 has been seen to cause problems.<P>
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- The change to the string is the S27=48 this shuts off the LAPM phase detection. <BR>
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- The above string should be used with the latest ROM.<P>
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- <U>Explanation of string AT Commands:</U><P>
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- &B1 - Locks the computer to modem speed at the speed of last AT command. This is necessary<BR>
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- for high speed modems in order to use data compression. It is also necessary if your connection rate does not match your<BR>
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- DTE speed as an example a port speed of 19200 in software, will make a 14,400 data connection.<P>
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- &D2 - Normal DTR operations. Modem resets upon receipt of DTR.<P>
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- &R2 - Hardware receive flow control uses the RTS signal to regulate the flow of data to the<BR>
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- modem.<P>
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- &K1- Auto enable/disable. The modem enables compression if the serial port rate <BR>
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- is fixed (&B1) and disables compresssion if the serial port rate follows the connection rate (&B0).<P>
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- &W - Write to the modem's non-volatile RAM. Each time you reset the modem with ATZ or<BR>
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- recycle the power, it will come up with the parameters stored in NVRAM.<P>
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- S13=1- Bit-mapped register. Reset when DTR drops.<P>
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- <BR>
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