[ns] Can I use other MAC for mobile nodes?

[F.W.]

For all the ns2/otcl scripts I read, the MAC protocol is always 802_11. Can
I use MAC protocol other than 802_11? As I see there is source code for
CSMA, etc. I once tried with an option "-macType Csma", but failed with a
error message of "invalid command".

Is it possible to use MAC protocol other than 802_11? What is the right way
to set it?

Many thanks.

Regards,
Frost