This chapter describes how you can use the Point-to-Point Protocol (PPP) to create collaborative networks in situations the telephone network is the only medium for data transmission you and your friends have access to. The operating system used by both server and client computers will be &TCD; release 5.5 I want to thank my friend Manual Chavez Manzano (Manny) for finding a way to download this release of &TCD; and bring it to me as a gift. (even higher releases might be used too). The configuration described in this book doesn't use third party software. All the software needed in this configuration is available inside &TCD;.