Help on disable encription on SSH1?

[Tim Chao]

In the manpage of ssh, the client is able to ask for a non-encryption
session.
Then I use the following to connect to a server running at 205.178.15.4.

./ssh -c none 205.178.15.4

However, I always get the following message.
"Selected cipher type none not supported by server."
The ssh1 I am using is ssh1.2.27. I assume I am doing something
wrong here because if the client has an option to disable the encryption

the server should have the option too.

Can somebody help on this?
Thanks!