知识大全 Configuring high-speed dialup

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　　/solaris/ /solaris/ 　　　　 This page contains detailed step by step instructions to configure Solaris and Solaris for high speed dial out and dial in using V modems It shows how to use Solaris to dialup and connect to a remote system with the Solaris system acting as a terninal on the remote system It also shows how to configure Solaris to answer an ining telephone call and provide terminal access to the calling system It doesn t cover connecting a Solaris system to an ISP; this is a special form of dial out and is covered in Configuring PPP on Solaris to connect to an ISP It also doesn t cover configuring a Solaris system as a PPP server accepting ining PPP connections; this is covered in Configuring PPP dial in on Solaris but this page is a prerequisite before configuring a PPP server 　　　　 What this page does cover is using Solaris to dialup a remote system and run a terminal session on that remote system It also covers the reverse scenario: allowing remote systems to dialup your Solaris system and run terminal sessions on it 　　　　 Why would you want to do this? You may want to use your Solaris system to connect to a BBS for example or to any remote system which allows terminal mode dial in access Or you may want to configure your Solaris system at the office to give your customers dial in access or to enable you to connect to it from a Windows PC at home 　　　　 Important Notes 　　　　 The instructions assume that your modem is external and attached to one of the o standard serial ports Note that you must have a real modem; monstrosities known as WinModems are of no use whatsoever with unix Unfortnately I have no experience of using internal modems with Solaris and there may be additional configuration issues with these I m not able to advise about issues with internal modems but there s some useful advice at Celeste Stokely s Web pages and especially in her Tutorial on Solaris x Modems & Terminals Celeste s pages cover the configuration of modems in very much more detail than is offered here and are highly remended for further reading This page is intended to provide a simple step by step procedure which should work for most people 　　　　 Now for the instructions No unix knowledge is assumed other than the ability to edit files using a text editor 　　　　 Configuring Solaris for high speed dial out 　　 Please note that you must be logged in as root while implementing these instructions 　　 These instructions describe how to configure Solaris and your modem for dial out to a remote puter Implement these instructions first even if you want to configure your system for dial in access 　　 Configure your serial port for dial out 　　 Start admintool under CDE: 　　 # admintool & 　　 Select the Browse menu and then Serial Ports from the drop down list Click on the line starting a if your modem is attached to the first serial port or on the line starting b if your modem is connected to the second serial port Select the Edit menu and then Modify from the drop down list 　　 Change the following fields: 　　 Template: Modem Dial out Only Baud Rate: 　　 Cick on OK and close admintool 　　 Test munication with the modem 　　 The unix mand tip is used to municate with a modem If you re interested in the gory detail the manual page for this mand can be displayed by typing: 　　 # man tip 　　 If your modem is attached to the first serial port: 　　 # tip /dev/cua/a 　　 If your modem is attached to the second serial port: 　　 # tip /dev/cua/b 　　 and the mand should respond: 　　 connected 　　 If it responds: 　　 All ports busy 　　 it means either that your serial port is configured incorrectly perhaps for dial in instead of dial out or that there is a more fundamental problem in municating with the port In this case have a look at Celeste Stokely s Tutorial on Solaris x Modems & Terminals which contains a wealth of useful information about modems 　　 Type: 　　 ATZ 　　 and the modem should respond: 　　 OK 　　 If there s no response from the modem check that you re using a straight through cable with pin at one end connected to pin at the other end pin to pin and so on A null modem or cross over cable designed for use with a terminal will not work 　　 Type: 　　 ATI 　　 Most modems respond to this mand by reporting their current settings If this doesn t work try AT&v ATL ATL ATL or AT*c If all else fails consult your modem manual When using a USR V modem it responds: 　　　　 U S Robotics K Message Settings 　　　　 B E F L M Q V X Y 　　 SPEED= PARITY=N WORDLEN= 　　 DIAL=TONE OFF LINE 　　　　 &A &B &C &D &H &I &K 　　 &M &N &P &R &S &T &U &Y 　　　　 Note that the actual speed at which Solaris is municating with the modem is only baud or characters per second despite the speed having been set using admintool to be The reason for this is that tip defaults to a speed of baud and we ll fix this in the next step 　　　　 Close tip by typing ENTER key tilde full stop as three key strokes: 　　　　 ~ 　　 Set the modem DTE speed 　　 Edit the file /etc/remote and insert a line at the start of this file reading: modem:dv=/dev/cua/a:br# 　　 if your modem is attached to the first serial port or: modem:dv=/dev/cua/b:br# 　　 if your modem is attached to the second serial port 　　 This enables us to municate with the modem at a speed of bits per second It s important to understand that there are o speeds to be considered in modem munication There s the speed at which the host puter talks to a connected modem and this is known as the Data Terminal Equipment or DTE speed There s also the speed at which the modem transmits and receives data across the telphone line and this is known as the Data Communication Equipment or DCE speed A K or V modem is capable of a DCE speed of up to K although this is unlikely to be achieved in practice Data sent down a telephone connection is often pressed with the receiving modem unpressing the data before sending it to the host puter So a modem to modem speed (DCE) of K could result in a modem to puter speed (DTE) well in excess of K For this reason the DTE speed should be set at least % higher than the maximum DCE speed and a DTE speed of is remended for use with K modems 　　 However not all Sun hardware is capable of talking to a serial port at this speed If you have a Sun Ultra or better or an Intel P or better your system should be able to sustain a DTE speed of If you have an older Sun system you may well not be able to drive a V modem at its maximum speed and will need to experiment to find the highest DTE speed that your hardware supports If doesn t work try specifying or in the line in /etc/remote 　　 Test high speed munication with the modem 　　 Try the tip test again this time specifying the name of the new entry in /etc/remote as a parameter to tip and you should be rewarded with a high speed connection to the modem: 　　　　 # 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