> serial cards are uncommon enough that standard drivers haven't been
> supplied with NetBSD, but are generally provided by the manufacturer.

> Frame isn't a particularly complex protocol, but I haven't seen much
> demand for it, since a cheap Cisco router is probably similarly priced
> to the sync serial card you would need...

in fact only used cisco is cheaper. anyway having sync card in NetBSD is
much easier as you configure only one device.