On Sat 15 Mar at 04:14 Ian Smith (3:626/660{at}fidonet) wrote to Arthur Marsh:

 IS> ?  V.29 is a leased-line protocol.

 AM> Well, a half-duplex protocol that was used by the then
 AM> Telstra for "fast training" modems,

 IS> On switched lines?

 AM> Not sure.

 IS> Ta.  I'm still curious if V.29 was later respecified or 
 IS> updated, or if V.17 etc 'adapted' its techniques to 2-wire 
 IS> switched mode?  Not a big deal ..

V.34 does have a half-duplex mode btw.

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