Bill Sommerfeld wrote:
Telnet has had BREAK since the dawn of time, and it doesn't have a break-length parameter.
Telnet BREAK is not in any way associated with serial port break signals.
I just looked at rfc2217 (telnet COM port control) which has a few more extensive features. I can't seem to find a timed-break feature, but it has a slightly different approach, which is to have separate "assert break"/"release break"; but it seems that using this to get a timed break would be tricky given unpredictable network and server-side crypto latencies..
Yes, this is a major flaw in RFC2217. There is no way to get the desired behavior due to the variability of network communications and the inability to force a packet to be sent on the network.
Oh, and if I remember I'll ask the guy down the hall from me who used to work on terminal servers in a past job for an opinion.. - Bill
Kermit software has supported since the early 80s both a Short Break and Long Break. A break less than 300ms is short; a break greater than 700ms is long. These due have meanings for some modems and some terminal servers.
Jeffrey Altman
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