Re: QD2 Protocol Specification

[Shou-Kuo Shao <[e-mail]>]

At 09:28 AM 1999/7/7 -0500, you wrote:
>
>> X-Sender: [e-mail]
>> Mime-Version: 1.0
>> Date: Wed, 07 Jul 1999 10:29:13 +0800
>> To: [e-mail]
>> From: Shou-Kuo Shao <[e-mail]>
>> Subject: QD2 Protocol Specification
>> 
>> 
>>     I am looking for the specification of QD2 protocol. 
>
>The only "QD2" standard I know of is EIA-485; it is available (for a fee) from 
>the EIA at:
>
>http://global.ihs.com/cgi-bin/detdoc.cgi?FRITTER=132871&DOCID=8612520    
>
>HTH,
>
>RGF
>
>=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=
>Robert G. Ferrell
>Internet Technologist
>National Business Center-Texas, US DoI  [e-mail]
>***************************************************************
>private static class NT extends DOS implements Nothing {
>***************************************************************
>

Dear Robert,

    Thank you for your message. You are right about the RS-485. The physical
layer normally used for QD2 protocol is RS-485. However, QD2 also specify
the upeer layer protocols that I don't know what exactly the protocol layers
they belonged.

    Thank you anyway! Hope someone out there could tell me the anwser about
QD2 protocol and where could I get it in free or purchase it.

Best Regards

Shou-Kuo Shao