The db9 with a female on each end should be a null-modem cable. You need to get a 25-pin gender changer for the blazer; put a 25-pin female to 9-pin male on the blazer, connect your 9 to 9 cable from that to the pc. Regards, Kerry. ----- Original Message ----- From: "Cody Hurst" <churst35@xxxxxxxxxxx> To: "Speakup is a screen review system for Linux." <speakup at braille.uwo.ca> Sent: Tuesday, May 20, 2008 11:50 AM Subject: Re: speakup, grml and braille blazer Then I probably don't have what you are alluding to. The only cables I have are a parallel db25 with male connectors on each end, and a db9 with female on each end. I am connecting the two via a converter that converts parallel db25 to a male db9. I can't just connect one to ther other, without this connecter I can't do anything. What would I do now since I probably don't have the cable you are refering to? Cody On May 19, 2008, at 5:43 PM, Kerry Hoath wrote: > don't confuse a null modem with a modem. > A modem is a device that lets your computer talk over phone lines. > > You should not have any rj11s near your bns; only serial cables. > > There are 2 layouts most commonly used for serial ports, the pc > style (dte) > and the modem style dce. > The blazer has a pc-style wiring on it but the gender is female. > You need to connect pc to pc so you need a null modem. > This is like in nedworking where you wish to connect pc to pc with > no hub or > switch you need a cross-over cable. > > A null modem is a device or cabling wire map that allows 2 computers > to talk > to each other over a serial link. > Assume we have 2 computers with a 9-pin serial connection wishing to > talk to > each other. > The cable in use is a straight through. Pin 2 is transmit and pin 3 is > receive and 5 is signal ground. > If the pins are wired straight through then the transmit and receive > pins > are wired transmit to transmit and receive to receive. > > This will not work as the transmit pin on one computer needs to be > wired to > the receive pin on the other. A null modem or cable does this for us. > Usually it's wired as > 2 to 3, 3 to 2, (transmit to receive) > 5 straight through (signal ground) > 4 to 6, 6 to 4, (cts to rts) > > Then cd is tied on one end to dsr and possibly dsr. > ----- Original Message ----- > From: "Cody Hurst" <churst35 at verizon.net> > To: "Speakup is a screen review system for Linux." <speakup at braille.uwo.ca > > > Sent: Tuesday, May 20, 2008 11:19 AM > Subject: Re: speakup, grml and braille blazer > > > I'm not quite understanding the logic behind the null modem, but ok. > When I plug the rj11 end of the cable to the pc, how do I tell speakup > to look on teh modem port if linux by default is in compatible with > most modems? > > On May 19, 2008, at 5:14 PM, Kerry Hoath wrote: > >> put a gender changer on the blazer to change the serial port from >> female to >> male on the blazer. >> plug a 25-pin female to 9-pin mail into the converter. >> plug the null modem from converter to pc. >> >> You could also get a 25-pin null modem cable; gender bend the blazer >> end >> then convert it down to 9-pin on the pc end. >> >> the cable needs to be null modem and you need things of the right >> gender as >> the port on the blazer for serial is female. >> Regards, Kerry. >> >> ----- Original Message ----- >> From: "Cody Hurst" <churst35 at verizon.net> >> To: "Speakup is a screen review system for Linux." >> <speakup at braille.uwo.ca >>> >> Sent: Tuesday, May 20, 2008 11:07 AM >> Subject: Re: speakup, grml and braille blazer >> >> >> Well I have a db9 null modem cable, but how would I do this >> configuration? the db9 end will not fit on the blazer and vice versa. >> More insight on this would greatly be appreciated. >> On May 19, 2008, at 5:02 PM, Kerry Hoath wrote: >> >>> the blazer requires a null modem cable to connect it to the computer >>> not a >>> straight through serial cable. >>> Regards, Kerry. >>> >>> ----- Original Message ----- >>> From: "Cody Hurst" <churst35 at verizon.net> >>> To: "Speakup is a screen review system for Linux." >>> <speakup at braille.uwo.ca >>>> >>> Sent: Tuesday, May 20, 2008 8:03 AM >>> Subject: speakup, grml and braille blazer >>> >>> >>> Hello all, >>> >>> I just realized I could whip up an external synth with a db25 >>> serial cable, a converter and a db9 serial cable, however when I >>> boot >>> grml I use this boot command >>> >>> grml speakup_synth=bns, ttyS0 and get no speech. On the blazer's >>> speech config menu I set it from parallel to serial. however I tried >>> starting grml with it on serial and parallel and still no speech. I >>> know this can be done but I just don't know how. I'd like to know >>> what >>> I"m doing wrong here. Thanks for any hep. >>> >>> Cody >>> _______________________________________________ >>> Speakup mailing list >>> Speakup at braille.uwo.ca >>> http://speech.braille.uwo.ca/mailman/listinfo/speakup >>> >>> _______________________________________________ >>> Speakup mailing list >>> Speakup at braille.uwo.ca >>> http://speech.braille.uwo.ca/mailman/listinfo/speakup >> >> _______________________________________________ >> Speakup mailing list >> Speakup at braille.uwo.ca >> http://speech.braille.uwo.ca/mailman/listinfo/speakup >> >> _______________________________________________ >> Speakup mailing list >> Speakup at braille.uwo.ca >> http://speech.braille.uwo.ca/mailman/listinfo/speakup > > _______________________________________________ > Speakup mailing list > Speakup at braille.uwo.ca > http://speech.braille.uwo.ca/mailman/listinfo/speakup > > _______________________________________________ > Speakup mailing list > Speakup at braille.uwo.ca > http://speech.braille.uwo.ca/mailman/listinfo/speakup _______________________________________________ Speakup mailing list Speakup at braille.uwo.ca http://speech.braille.uwo.ca/mailman/listinfo/speakup
