Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!europa.asd.contel.com!seka.scc.com!enger From: enger@seka.scc.com (Robert M. Enger) Newsgroups: comp.dcom.modems Subject: Re: net-blazer queries Message-ID: <1991Jan27.181304.8055@europa.asd.contel.com> Date: 27 Jan 91 23:13:03 GMT References: Reply-To: enger@seka.scc.com Organization: CONTEL Federal Systems Lines: 37 Nntp-Posting-Host: seka.scc.com In article , mrapple@quack.sac.ca.us (Nick Sayer) writes: |> |> The link itself is a voice-grade audio, plug-in-two-telephones- |> and-talk leased line. |> Hello: If you are using an old style analog leased line, then you can request a 4-wire interface. This will allow you to dispense with the v.32 style echo cancellation, and all the other problems related to trying to get bi-directional data transfer to take place on a 2-wire interface. You can now start talking about 'leased-line'-class modems. You should be able to do very well these days. 19.2Kbps (or more) reliably, all the time. The part that pains me in this scenario is that 'telco' is carrying your service internally over a 56/64 Kbps channel. The reason that you can't get full use of that channel is that your data stream is not synchronized to the telephone company's equipment (so to speak). If you forked out for a 'dds' type of connection, then you could get full access to the 56/64 Kbps. Its a shame that the telco's charge so much more for DDS service. Pretty much the only extra work for them in providing a DDS service (vs a 4-wire analog) is the time it takes to remove any loading-coils from the 'local-loop' (the wires connecting your premesis to the telco central office). Good luck with your new connection, Bob -- Robert M. Enger CONTEL Federal Systems enger@seka.scc.com (Internet)