I've done some testing, and come to some conclusions. The Saturn on the dialing end must hear a dial tone before dialing, and the Saturn on the receiving end must hear a ring tone. I don't know
how many ring tones, as I've never been on the "wait" end of a Netlink game, but I'd assume it picks up after the first one. (Hint: Someone who knows please tell me; I'd like to know) The problem is, while the line voltage inducer provides enough power for the modems to communicate, it does not simulate either a dial tone or a ring tone, so the calling Saturn will never dial and the receiving Saturn will never pick up.
Unless both a dial tone and ring tone can be simulated, OR you can swap lines quickly enough (a very VERY difficult and complicated task for our purposes), I don't see any other way to do this. I'm currently working on a way to simulate these sounds for our purposes, but I'm not done yet.
If you REALLY wanted to try swapping the lines, here's my guess at how you'd proceed (note, it's only a guess... while in theory I think it should work, I can't account for what some of the equipment might do while you try this):
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You would need:
-A land line (having two lines would make this much easier, they can even be VOIP as long as they produce normal dial and ring tones)
-Either a buddy or a cell phone to call your land line
-A line voltage inducer
*****
I'm writing this under the assumption that you have only one land line. If you had two non-VOIP lines, you could just dial your other line. =P
1) With the same game in each system, bring one of them to the "Quick Link" "Dial" screen, and one to the Quick Link "Wait" screen. We'll call these Saturns "Caller" and "Receiver" respectively.
2) Connect Caller to your land line and type in 111-1111 in the window, but do not hit Dial yet. (A nice phone number that shouldn't actually get anyone's house, I think)
3) Either have your cell phone or buddy standing by with your land line's number entered in their phone, but don't let them hit "talk" yet.
4) Hit "Dial" on the Caller system. Listen for the quiet "click" sound that your Netlink makes right before it starts dialing. Count to 3, then disconnect the phone line from Caller and plug it into Receiver's modem port. (Note: Being connected to the land line gives Caller the dial tone it needs)
5) Quickly hit "Talk" on your/your buddy's cell phone. Hopefully you won't get a busy signal. When/if Receiver acts like it's picking up, disconnect the land line from it, and immediately plug the line voltage inducer into both Caller and Receiver's Netlinks. (Note: Being connected to the land line when your line receives the phone call gives Receiver the ring tone it needs)
In theory, if everything was done quickly enough and neither modem complained that it lost signal partway through whatever it was doing and gave up, you'll probably have a working connection between your two Saturns.
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Anyway, that's my best guess. It probably wouldn't work very well, but I figure if you could convince Caller that it had heard a dial tone so that it started dialing, and Receiver that it heard the phone ring so that it would pick up, they'd do their little synchronization dance and act just as they would if you'd used a normal phone line. It's exactly the same theory as with the dial-up server for the PlanetWeb browser, except the PlanetWeb browser can be told to dial even if it doesn't hear a dial tone (Blind Dial), and the computer can be told to pick up without hearing a ring tone (Allow Caller Access, Apply). Since the Netlink games don't give you those options, we have to find a way to simulate the sounds for the modems, one way or another.
***** IMPORTANT! -- I have no idea what would happen to your phone line if you connected a powered line voltage inducer to it. My advice: Don't. Unless you're willing to deal with the possible risk of fire or overloading something (either your inducer or your land line, or maybe your internet connection if it's connected to your phone line in any way), I don't recommend trying it. I'm not an electronics expert, but I figure that adding power to an already powered line isn't a good idea. Your phone company would probably be upset, too. Be careful not to accidentally connect it to your land line while swapping cables.