Yes, it works PPP. I have used it with several normal ISPs. However there is no DLink technical support on the handshaking or protocols. I am using a MultiTech 56K stand alone modem. I have a 25 pin gender changer and a 9-25 pin converter. I don't understand why it works, only that it does. I tied to make my own connector cable and it didn't work. robert wrote: >Hi. I saw that you own a DI-704 D-Link router and are using the serial >port with a modem. I currently do not own this router, but was thinking of >purchasing it. Does the router communicate to your ISP via PPP (through the >modem)? The specs I saw on the web page don't mention plain PPP at all. > >Thanks. > >