The standard Gandalf units supports:
Gandalf's 8:1 compression (gets about 4:1
reliably)
Gandalf proprietary Bandwidth-on-Demand
Optional POTS interface
Full 10BaseT or (optional) 10Base2 Ethernet
connectivity
With the EdgeRouter option, you get:
Source/Destination routing
Multi-Link PPP
PAP / CHAP authentication
ML-PPP Bandwidth-on-Demand
Check out Gandalf's 5242i Web page for more info.
Here are two FAQ files on various Gandalf units and how to set them up:
This is a FAQ on some general and specific5242 and 5240 setup issues.
Here is a FAQ on how to setup a Gandalf 5242 Edge Router.