[plug] checking serial ports

[Barry]

i am trying to setup 2 modems on my serial ports on ttyS1 this is no problem
but when i try to comuunicate on ttyS0 i get no response. even if i swap the
known working modem over.

this is using a redhat 6.2 on a p166 for a fax server using hylafax.

as i have tried swapping modems and cables i suspect it is the port

/dev/ttyS0 has the same permissons as ttyS1

any other ways to try and get this working???

barry