Solved communications between win xp and win nt

February 15, 2013 at 14:16:24
Specs: Windows XP
what is the highest speed for serial communication between windows xp sp3 and windows nt 4.0, i'm using hyper terminal but when it comes to selecting the speed there is a wide range

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#1
February 16, 2013 at 01:34:40
✔ Best Answer
Select the highest speed supported by the other end of the connection, i.e. you can select up to 128000 bps but if the coupled device on XP or NT supports only 9600 that is your limit. Anyway you have to set the same speed on both ends of the connection. Serial COM ports usually can run at 128000 bps since Windows 98, but modems and many devices are limited to slower speed.

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#2
February 16, 2013 at 07:52:54
tvm IVO for your fast answer. one of the computers is an ibm thinkpad 560z notebook (the one with nt), has a mobile pentium II 233 mhz 512 kb l2 cache processor, 96 mb ram, 4 gb hdd and a pci bus capable of 32-bit transfers. it also has support for two type II pc cards but they're already filled with two pcmcias (us robotics 56k modem and ibm 4x cd-rom drive). it hasn't any pcmcia networking card that i could use. i had never used this notebook any more since the old win95 days but it has some important information that i need just now. i was fearing that this oldie could not support speeds beyond 9600 but bearing your answer in mind i tried with 38400 first, then 57600, and later with 115200 and it worked fine with this last one, no losses at all, so now i can get back the information regarding old clients. once more thank you very much for your help.

by the way, i'm not using the 56k modem for this, i connected both computers thru their serial ports instead (the other computer is a pcchips p55g v1.0 motherboard with an intel core 2 duo processor, 4 gb ddr2 ram, geforce7050/610i chipset and 32-bit win xp sp3).


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#3
February 16, 2013 at 09:43:53
Glad you successfully got the job done. Obviously you did not use modems to perform the link since to directly connect two computers via modems you have to emulate a phone channel between with specific impedance and the resulting speed is limited at 56 kbs. I guess you connected via a serial crossover cable laplink-like.

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#4
February 16, 2013 at 12:38:37
you guessed right, a friend of mine who's a computer technician gifted me with just the necessary serial crossover cable. the database has over 3000 clients and is 178 mb in size so i think it'll take at least 3.5 to 4 hours to complete the transfer at 115200 bits/s. in the meanwhile i'll take a break listening to the beatles, ha ha. thanks and so long.

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