Something is not clear to me here... "PPPoS" might be confused with PPP over SONET/SDH You guys are talking about plain old PPP, RFC-1661, Point-to-Point Protocol, which (by definition) works over any point-to-point link, as long as it is full-duplex and can carry bytes (octets). I guess "point-to-point" and "peer-to-peer" can be considered equivalent in this aspect. So... Please forgive my ignorance, I don't know what a SwMi is (even less a centralized one) ;^) PPP runs on telephone modems and serial ports, although, as Sylvain cleverly points out, SLIP will have way less overhead, both in bandwidth and code size. Perhaps confusion comes from the way cell modems capture PPP by "dialing" a fake number ? Or because of authentication with PAP/CHAP ? As long as the two end points can see each other, you can establish a PPP link or a SLIP link. You don't need to "dial" or "login" to have PPP working. Authentication is not mandatory, you can bypass it. Regards --
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