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IR ports - How fast ?

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Al Dykes
 
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Default IR ports - How fast ? - 03-14-2005 , 03:21 PM






How fast is the IR port that's built into my laptop, for instance?

The setup info I've seen makes it look like a COM port and that would
suggest a speed below 200kb/sec.

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Arno Wagner
 
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Default Re: IR ports - How fast ? - 03-14-2005 , 06:12 PM






Previously Al Dykes <adykes (AT) panix (DOT) com> wrote:
Quote:
How fast is the IR port that's built into my laptop, for instance?

The setup info I've seen makes it look like a COM port and that would
suggest a speed below 200kb/sec.
Correct. AFAIK 196 kBit/sec is the maximum speed. On the
computer-side it is just a com-port and many boards have
dual-use com ports that can be used for IR and as regular
com ports (different voltage levels on both).

I think IR also has a syncronous layout, but that just means
that the pause between two frames (words) has a fixed
length, while in the commonly used asyncronous from it
is of arbitrary length. The delay between data transfer
units (Packets with header, body and trailer) is still
arbitrary.

Arno


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Chris Hill
 
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Default Re: IR ports - How fast ? - 03-15-2005 , 08:37 AM



On 14 Mar 2005 15:21:43 -0500, adykes (AT) panix (DOT) com (Al Dykes) wrote:

Quote:
How fast is the IR port that's built into my laptop, for instance?

The setup info I've seen makes it look like a COM port and that would
suggest a speed below 200kb/sec.
Yes, it can be used in that manner. There is also another standard
that goes to 4mbps if my memory serves.




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