Each ttySV device of VXC serial card has a corresponding auxiliary device
cuaV with the same minor number but different major number that create by
script ixcom.inst automatically.
# ls -la /dev/cuaV?
crw-rw-rw- 1 root root 253, 64 Jul 14 10:13 /dev/cuaV0
crw-rw-rw- 1 root root 253, 65 Jul 14 10:13 /dev/cuaV1
crw-rw-rw- 1 root root 253, 66 Jul 14 10:13 /dev/cuaV2
crw-rw-rw- 1 root root 253, 67 Jul 14 10:13 /dev/cuaV3
crw-rw-rw- 1 root root 253, 68 Jul 14 10:13 /dev/cuaV4
crw-rw-rw- 1 root root 253, 69 Jul 14 10:13 /dev/cuaV5
crw-rw-rw- 1 root root 253, 70 Jul 14 10:13 /dev/cuaV6
crw-rw-rw- 1 root root 253, 71 Jul 14 10:13 /dev/cuaV7
crw-rw-rw- 1 root root 253, 72 Jul 14 10:13 /dev/cuaV8
crw-rw-rw- 1 root root 253, 73 Jul 14 10:13 /dev/cuaV9
VXC Cards User’s Manual (Ver. 1.1, 06/09.2005, pmh-012-01) -----27