Right - it would be a shame to just let this rot on my hard disk.
http://m0n0.ch/wall/downloads-local/net48xx-wanpipe-1.11.imgBut please, *no* questions about this anywhere but in this forum thread!
Under "Extensions -> T1 configuration", you'll need to enable the T1 interface, set the desired mode (Cisco HDLC, Frame Relay or PPP) and input the required parameters (depending on the mode). After a reboot, this will then automatically become your WAN interface (WAN -> wagaw0).
It's only been tested with two A101u connected back-to-back, and never on a real T1, so YMMV. Since it is implemented as an extension, it should (at least in theory
be relatively easy to port to 1.23 (or even 1.3b); all the WANPIPE drivers would have to be recompiled for the newer FreeBSD release though.
If you give it a try, please let us know if it works...