On Mon, Nov 2, 2009 at 1:23 PM, narendra sisodiya <[email protected]> wrote: > On Mon, Nov 2, 2009 at 1:15 PM, Arun Khan <[email protected]> wrote: >> On Monday 02 Nov 2009, narendra sisodiya wrote: >>> On Mon, Nov 2, 2009 at 10:28 AM, Arun Khan <[email protected]> wrote: >>> > On Monday 02 Nov 2009, narendra sisodiya wrote: >> ... snip ... >>> >> >>> >> IMHO, 500m crossover cable can connect,, >>> > >>> > ethernet may require a repeater. Another possibility - a serial >>> > connection (null modem) using twisted pair (shielded if you can >>> > afford it). One computer is the client, the other is the server. >>> > TCP/IP stack over PPP connection. >>> >>> Yes, that is good idea, May you explain more? >> The idea was more of a concept in my mind rather than an implemented >> solution. Having seen remote terminals (console) connected over >> twisted pair (TP), to servers across campus, I see the PPP stack as an >> extension of that idea. The modem "chat" aspect may not be necessary >> in the client side connection setup. Likewise, on the server side >> setup RAS on the serial tty. >> >>> serial transmission ? >> Yes. >> >>> are you saying to transmit over DB9 connector ?? >> Yes. > 500m over DB9 cable ? it seems much difficult as at slow speed their > will be lots of distortion in signal. > I do not think so it may work,, from : http://en.wikipedia.org/wiki/RS-232 "The standard does not define a maximum cable length but instead defines the maximum capacitance that a compliant drive circuit must tolerate. A widely-used rule-of-thumb indicates that cables more than 50 feet (15 metres) long will have too much capacitance, unless special cables are used. By using low-capacitance cables, full speed communication can be maintained over larger distances up to about 1,000 feet.[7] For longer distances, other signal standards are better suited to maintain high speed."
>> >> -- >> Arun Khan >> _______________________________________________ >> To unsubscribe, email [email protected] with >> "unsubscribe <password> <address>" >> in the subject or body of the message. >> http://www.ae.iitm.ac.in/mailman/listinfo/ilugc >> > > > > -- > ┌─────────────────────────┐ > │ Narendra Sisodiya ( नरेन्द्र सिसोदिया ) > │ Web : http://narendra.techfandu.org > │ Twitter : http://tinyurl.com/dz7e4a > └─────────────────────────┘ > -- ┌─────────────────────────┐ │ Narendra Sisodiya ( नरेन्द्र सिसोदिया ) │ Web : http://narendra.techfandu.org │ Twitter : http://tinyurl.com/dz7e4a └─────────────────────────┘ _______________________________________________ To unsubscribe, email [email protected] with "unsubscribe <password> <address>" in the subject or body of the message. http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
