On 9/15/2014 8:42 AM, Dick Dievendorff wrote:
My point is that multiple transmitters on an RS-232 link aren't likely to
work well because the protocol is point to point, and there is no "collision
recovery" protocol. This isn't an Ethernet cable. It's RS-232. Point to
point, not multipoint.
Ethernet is multipoint to multipoint because there are protocols on top
of the electrical specification that allow multiple transmitters, and
detect and deal with corrupt data and collisions.
RS-232 doesn't have that level of protocol. I don't have the spec.
handy, but I don't think it goes beyond the electrical specification.
It's possible to put some more elaborate protocol on top of RS-232 and
make it work, but it isn't part of the K3 serial protocol.
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