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echo: locsysop
to: Rod Speed
from: Paul Edwards
date: 1993-04-30 22:56:02
subject: sealink

RS> I didnt meant that a script of mine was using any normal text like
 RS> 'please start the download'.

 RS> Just that I saw the first packet from the sender and could then manually
 RS> or with the script initiate the Sealink at my end. Thats what I was
 RS> waiting for with the test.

 RS> Infact come to think of it I think Telemate does do an auto sealink
 RS> startup on the remote, using the burst of non human text intended from
 RS> the sender. It does that for quite a few protocols and you can define
 RS> the autostart string in the external protocol config too. Quite an
 RS> elegant technique. But it does depend on the protocol on the BBS
 RS> actually sending something relatively unique. Most modern protocols do
 RS> tho.

Come on Rod, I'm not going to let you weasel out of this one.  Sealink
can't start sending until it gets a NAK or CRC.  THAT'S how it knows
whether to use a CRC or a checksum.  It also can't start sending because it
doesn't know whether to send block 0 or block 1.  If it gets a NAK or a 'C'
on block 0, it knows that it is talking to another Sealink.  If it gets
anything else, it is talking to Xmodem.  It is not possible for the Sealink
sender to transmit anything meaningful.  Tell me what Telemate has set up
so that it can do an automatic Sealink download.  Sealink isn't
particularly modern, BTW.  It was the first thing to replace Xmodem, and
that was a long time ago.  BFN.

Paul

--- GoldED 2.40
* Origin: Ten Minute Limit (3:711/934)

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