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purchase valium Leased line Mini HOWTO Rob van der Putten, rob@sp purchase valium t.nl v2.1, 3 August 2000 Configuring your modem purchase valium nd pppd to use a 2 wire twisted pair leased line. purchase valium _________________________________________________ purchase valium ____________________ Table of Contents 1. Introd purchase valium ction 1.1 Copyright and License 1.2 What i purchase valium a leased line 1.3 Assumptions 2. Modem 2 purchase valium 1 Modem Configuration 2.2 Test 2.3 Example purchase valium 2.3.1 Hi-Tech 2.3.2 Tornado FM 228 purchase valium 2.3.3 Tron DF 2.3.4 US Robotics Cou purchase valium ier V-Everything 3. PPPD 3.1 Configuration purchase valium 3.2 Scripts 3.2.1 Starting the pppd and ke purchase valium ping it alive 3.2.2 Setting the routes purchase valium .3 Test _________________________________________ purchase valium ____________________________ The most recent (bet purchase valium ) version of this HOWTO can be found at: http://w purchase valium w.sput.nl/software/leased-line/ 1. Introduction purchase valium 1.1. Copyright and License This document is dist purchase valium ibuted under the terms of the GNU Free Documentat purchase valium on License. You should have received a copy along purchase valium with it. If not, it is available from http://www. purchase valium sf.org/licenses/fdl.html. 1.2. What is a leased purchase valium ine Any fixed, that is permanent, point to point purchase valium ata communications link, which is leased from a t purchase valium lco or similar organisation. The leased line inv purchase valium lves cables, such as twisted pair, coax or fiber o purchase valium tic, and may involve all sorts of other hardware purchase valium uch as (pupin) coils, transformers, amplifiers an purchase valium regenerators. This document deals with: purchase valium Configuring your modem and pppd to use a 2 wire t purchase valium isted pair leased line. This document d purchase valium es NOT deal with: SLIP, getting or installi purchase valium g pppd, synchronous data communication, bas purchase valium band modems, xDSL. 1.3. Assumptions You should purchase valium lready have a working pppd on your system. You al purchase valium o need Minicom or a similar program to configure purchase valium our modems. 2. Modem A leased line is not conne purchase valium ted to a telephone exchange and does not provide purchase valium C power, dial tone, busy tone or ring signal. This purchase valium means that your modems are on their own and have purchase valium o be able to deal with this situation. You shoul purchase valium have 2 identical (including firmware version) ext purchase valium rnal modems supporting both leased line and dumb purchase valium ode. Make sure your modems can actually do this! purchase valium lso make sure your modem is properly documented. purchase valium You also need: · 2 fully wired shielded RS232 ca purchase valium les. The shield should be connected to the con purchase valium ector shell (not pin 1) at both ends (not at one e purchase valium d). · A RS232 test plug may be handy for test pu purchase valium poses. · 2 RJ11 cords, one for each end of the leased line. · A basic understanding of `AT' commands. 2.1. Modem Configuration A note on modem configuration and init strings in general: Configure your modem software such as minicom or (m)getty to use the highest possible speed; 57600 bps for 14k4 and 115200 bps for 28k8 or faster modems. Lots of people use very long and complicated init strings, often starting with AT&F and containing lots of modem brand and -type specific commands. This however is needlessly complicated. Most programs feel happy with the same modem settings, so why not write these settings in the non volatile memory of all your modems, and only use `ATZ' as an init string in all your programs. This way you can swap or upgrade your modems without ever having to reconfigure any of your software. Most progr
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