diff --git a/Manuals/Tcpi-ug/Configurations/Ppp/modem.docbook b/Manuals/Tcpi-ug/Configurations/Ppp/modem.docbook new file mode 100644 index 0000000..dd748a4 --- /dev/null +++ b/Manuals/Tcpi-ug/Configurations/Ppp/modem.docbook @@ -0,0 +1,227 @@ + + + The Modem Device + + + This section describes the steps you should follow to install + and configure the modem device in the computer. This section + applies both to server and client computers. + + + + Installation + + The modem device installation consists on attacthing the modem + hardware both to the computer and the telephone line. To + connect the modem to your computer, you need to connect the + serial or USB cable that comes from the modem hardware to the + appropriate input on your computer. To connect the modem to + the telephone line system, you need to unplug the cable that + connects your phone device and plug it on the modem device, + specifically in the port reserved for data transmission. + Later, using a similar cable, you could connect your phone + device to the modem's phone port, so you be able of realizing + phone calls when no data transmition take place, as well. + + + + To be on the safe side, do all the installation with the + computer turned off. Then, when everthing has been put in + place, turn it on. Once the system is up, you can verify the + modem hardware using either the lsusb or + lspci commands. For example, if you are + using an USB modem like that one we mentioned before, run the + following command: + + + sudo /sbin/lsusb + + + and you should get an output similar to the following: + + + +Bus 003 Device 001: ID 0000:0000 +Bus 001 Device 001: ID 0000:0000 +Bus 001 Device 002: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader +Bus 002 Device 001: ID 0000:0000 +Bus 005 Device 003: ID 06e0:f104 Multi-Tech Systems, Inc. +MT5634ZBA-USB MultiModemUSB (new firmware) +Bus 005 Device 001: ID 0000:0000 +Bus 005 Device 002: ID 046d:c018 Logitech, Inc. Optical Wheel Mouse +Bus 004 Device 001: ID 0000:0000 + + + + The relevant line here is that mentioning the existence of a + Multi-Tech System, Inc. MT5634ZBA-USB MultiModemUSB (new + firmware) device. + + + + + + Configuration + + + The modem configuration depends on whether you are setting the + server computer or the client computer. Nevertheless, the + configuration stuff related to modem detection is both valid + on server acn client computers. + + + + Detecting The Modem Device + + + Once the modem hardware has been installed in the computer, it + is necessary to determine what device inside the operating + system it was assigned to, so applications like + pppd and chat can talk + to it. To perform this very specific configuration step, run + the following command: + + + sudo /usr/bin/wvdialconf /etc/wvdial.conf + + + The wvdialconf command comes with the + wvdial + + wvdial is an intelligent PPP dialer + that takes care of dialing a modem and starting PPP to + connect almost any ISP without special configurations. It + is something like the chat + program, except that it uses heuristics to guess how to + dial and log into your server rather than forcing you to + write a login script. + package and detects your modem, its maximum + baud rate, and a good initialization string. Later, using this + information, it generates or updates the + wvdial configuration file + (/etc/wvdial.conf). The output produced + by wvdialconf command looks as the + following: + + + +Scanning your serial ports for a modem. + +ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud +ttyS0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud +ttyS0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up. +Port Scan<*1>: S1 S2 S3 +WvModem<*1>: Cannot get information for serial port. +ttyACM0<*1>: ATQ0 V1 E1 -- OK +ttyACM0<*1>: ATQ0 V1 E1 Z -- OK +ttyACM0<*1>: ATQ0 V1 E1 S0=0 -- OK +ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK +ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK +ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK +ttyACM0<*1>: Modem Identifier: ATI -- LT V.90 1.0 MT5634ZBA-USB +Data/Fax Modem (Dual Config) Version 5.18e +ttyACM0<*1>: Speed 4800: AT -- OK +ttyACM0<*1>: Speed 9600: AT -- OK +ttyACM0<*1>: Speed 19200: AT -- OK +ttyACM0<*1>: Speed 38400: AT -- OK +ttyACM0<*1>: Speed 57600: AT -- OK +ttyACM0<*1>: Speed 115200: AT -- OK +ttyACM0<*1>: Speed 230400: AT -- OK +ttyACM0<*1>: Speed 460800: AT -- OK +ttyACM0<*1>: Max speed is 460800; that should be safe. +ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK + +Found an USB modem on /dev/ttyACM0. +Modem configuration written to /etc/wvdial.conf. +ttyACM0<Info>: Speed 460800; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0" + + + + which produces the following wvdial + configuration file: + + + +[Dialer Defaults] +Modem = /dev/ttyACM0 +Baud = 460800 +Init1 = ATZ +Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 +ISDN = 0 +Modem Type = USB Modem +; Phone = <Target Phone Number> +; Username = <Your Login Name> +; Password = <Your Password> + + + + At this point, the computer should be ready to attend incoming + calls. When an incoming call is detected by the computer, the + pppd deamon responds to it. To + configure the way such incoming calls are attended (e.g., + forcing user authentication, restricting the phone numbers the + calls can be initiated from, etc.), you need to set-up the + pppd deamon to fit your needs. On + the other hand, if you are configuring a computer to act as + client, you need to realize a few more tunning steps on + /etc/wvdial.conf to set the information + related of that Internet Service Provider (ISP) you want to + get connected in (e.g., by uncommenting the + Phone, Username and + Password lines above to set the appropiate values + there) and then, instruct to pppd + deamon about the user credential (e.g., user name and + password) you will use to connect the target ISP. In this + case, credentials defined both in + wvdial and + pppd applications must be exactly + the same. + + + + + + The Server Settings + + + ... + + + + + + The Client Settings + + ... + + + + + + + Verification + + ... + + + +--> WvDial: Internet dialer version 1.54.0 +--> Cannot get information for serial port. +--> Initializing modem. +--> Sending: ATZ +ATZ +OK +--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 +ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 +OK +--> Modem initialized. +--> Sending: ATDT520347 +--> Waiting for carrier. +ATDT520347 +NO DIALTONE +--> No dial tone. +--> Disconnecting at Thu Sep 29 13:04:30 2011 + + + +