Help: stty -echo

[Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>]

Hi,

One of our zsh user logs in via X.25 and he wants local echoing.
So he tried to switch off echoing by

$ stty -echo

However, the command has no effect in zsh. (It works in ksh, csh, bash.) 
The zsh versions we tried are 2.5.03 and 2.6-beta10-hzoli10.3 on Solaris 2.4.

Is this an (old) bug? How could it be fixed?

Thanks any suggestion in advance!

Best regards,
Jozsef Kadlecsik
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