number of serial ports on a pogoplug pink v2?

[joeblow]

Hi,

how many serial ports are built into the pogoplug pink v2? arch seems to think there are two:

[root@alarm ~]# ls -la /dev/ttyS*
crw-rw---- 1 root tty 4, 64 Dec 31 18:01 /dev/ttyS0
crw-rw---- 1 root uucp 4, 65 Dec 31 18:00 /dev/ttyS1

but I can only find references to the console port CON3. Where's the second entry ttyS1 coming from?

Thanks

[WarheadsSE]

They may not be pinned out, but still present in the SoC of the Kirkwood.