Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!mips!apple!fox!portal!cup.portal.com!Lance_C_Norskog From: Lance_C_Norskog@cup.portal.com Newsgroups: comp.dcom.modems Subject: Modems & CTS Message-ID: <25213@cup.portal.com> Date: 20 Dec 89 07:56:20 GMT Distribution: usa Organization: The Portal System (TM) Lines: 13 Hello, I have a question about modem standards and industry practices. How is CTS (hardware flow control) implemented? The old Bell 300/1200 modems implemented this via separate tones. Has a separate channel for CTS/DTS signaling made it into the subsequent modem standards? Do smart modems implement it and operate properly? I'm interested particularly in using CTS/DTS for signaling to the remote end of a modem session, with no relevance to flow control. Can this be done? Lance Norskog thinman@cup.portal.com