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36.  Solaris PPP 4.0 Reference Defining the Conversation on the Dial-up Link Chat Script Examples /etc/ppp/myisp-chat.tmpl Chat Script Template  Previous   Contents   Next 
   
 

Modem Chat Script for Calling an ISP

Use the next chat script as a template for calling an ISP from a dial-out machine with a US Robotics Courier modem.

ABORT   BUSY
ABORT   'NO CARRIER'
REPORT  CONNECT
TIMEOUT 10
"" AT&F1M0&M5S2=255
SAY     "Calling myisp\n"
TIMEOUT 60
OK      "ATDT1-123-555-1212"
CONNECT \c
\r \d\c
SAY "Connected; running PPP\n"

The following table describes the contents of the chat script.

Script Contents

Explanation

ABORT BUSY

Abort transmission if the modem receives this message from the opposite peer.

ABORT 'NO CARRIER'

Abort transmission if the modem receives this message from the opposite peer.

REPORT CONNECT

Gather the CONNECT string from the modem and print it out.

TIMEOUT 10

Set initial timeout to 10 seconds. The modem's response should be immediate.

"" AT&F1M0M0M0M0&M5S2=255

M0 - Turn off the speaker during connect.

&M5 - Make the modem require error control.

S2=255 - Disable the TIES "+++" break sequence.

SAY "Calling myisp\n"

Display the message "Calling myisp" on the local machine.

TIMEOUT 60

Reset the timeout to 60 seconds to allow more time for link negotiation.

OK "ATDT1-123-555-1212"

Call the remote peer by using the phone number 123-555-1212.

CONNECT \c

Wait for the CONNECT message from the opposite peer's modem.

\r \d\c

Wait until the end of the CONNECT message.

SAY "Connected; running PPP\n"

Display the informative message "Connected; running PPP" on the local machine.

Basic Chat Script Enhanced for a UNIX-Style Login

The next chat script is a basic script that is enhanced for calling a remote Solaris peer or other UNIX-type peer. This chat script is used in "How to Create the Instructions for Calling a Peer".
        SAY "Calling the peer\n"
        TIMEOUT 10
        ABORT BUSY
        ABORT 'NO CARRIER'
        ABORT ERROR
        REPORT CONNECT
        "" AT&F1&M5S2=255
        TIMEOUT 60
        OK ATDT1-123-555-1234
        CONNECT \c
        SAY "Connected; logging in.\n"
        TIMEOUT 5
        ogin:--ogin: pppuser
        TIMEOUT 20
        ABORT 'ogin incorrect'
        ssword: \qmypassword
        "% " \c
        SAY "Logged in.  Starting PPP on peer system.\n" 
        ABORT 'not found'
        "" "exec pppd"
        ~ \c
The following table explains the parameters of the chat script.

Script Contents

Explanation

TIMEOUT 10

Set initial timeout to 10 seconds. The modem's response should be immediate.

ABORT BUSY

Abort transmission if the modem receives this message from the opposite peer.

ABORT 'NO CARRIER'

Abort transmission if the modem receives this message from the opposite peer.

ABORT ERROR

Abort transmission if the modem receives this message from the opposite peer.

REPORT CONNECT

Gather the CONNECT string from the modem and print it out.

"" AT&F1&M5S2=255

&M5 - Make the modem require error control.

S2=255 - Disable the TIES "+++" break sequence.

TIMEOUT 60

Reset the timeout to 60 seconds to allow more time for link negotiation.

OK ATDT1-123-555-1234

Call the remote peer by using the phone number 123-555-1212.

CONNECT \c

Wait for the CONNECT message from the opposite peer's modem.

SAY "Connected; logging in.\n"

Display the informative message "Connected; logging in," to give the user status.

TIMEOUT 5

Change the timeout to enable quick display of the login prompt.

ogin:--ogin: pppuser

Wait for the login prompt. If it is not received, send a RETURN and wait. Then send the user name pppuser to the peer. The sequence that follows is referred to by most ISPs as the PAP login, though it is not related in any way to PAP authentication.

TIMEOUT 20

Change the timeout to 20 seconds to allow for slow password verification.

ssword: \qmysecrethere

Wait for the password prompt from the peer. When the prompt is received, send the password \qmysecrethere. The \q prevents the password from being written to the system log files.

"% " \c

Wait for a shell prompt from the peer. The chat script uses the C shell. Change this value if the user prefers to log in with a different shell.

SAY "Logged in. Starting PPP on peer system.\n"

Display the informative message "Logged in. Starting PPP on peer system" to give the user status.

ABORT 'not found'

Abort the transmission if the shell encounters errors.

"" "exec pppd"

Start pppd on the peer.

~ \c

Wait for PPP to start on the peer.

Starting PPP right after the CONNECT \c is often called a PAP login by ISPs, though the PAP login is actually not part of PAP authentication.

The phrase ogin:--ogin: pppuser instructs the modem to send the user name, in this example pppuser, in response to the login prompt that is received from the dial-in server. pppuser is a special PPP user account name that was created for remote user1 on the dial-in server. For instructions on creating PPP user accounts on a dial-in server, refer to "How to Configure Users of the Dial-in Server".

Chat Script for External ISDN TA

The following chat script is for calling from a dial-out machine with a ZyXEL omni.net. ISDN TA.
        SAY "Calling the peer\n"
        TIMEOUT 10
        ABORT BUSY
        ABORT 'NO CARRIER'
        ABORT ERROR
        REPORT CONNECT
        "" AT&FB40S83.7=1&K44&J3X7S61.3=1S0=0S2=255
        OK ATDI18882638234
        CONNECT \c
       \r \d\c
        SAY "Connected; running PPP\n"

The following table explains the parameters of the chat script.

Script Contents

Explanation

SAY "Calling the peer"

Display this message on the screen of the dial-out machine.

TIMEOUT 10

Set the initial timeout to 10 seconds.

ABORT BUSY

Abort transmission if the modem receives this message from the opposite peer.

ABORT 'NO CARRIER'

Abort transmission if the modem receives this message from the opposite peer.

ABORT ERROR

Abort transmission if the modem receives this message from the opposite peer.

REPORT CONNECT

Gather the CONNECT string from the modem and print it out.

""

AT&FB40S83.7=

1&K44&J3X7S61.3=1

S0=0S2=255

The letters in this line have the following meaning:

  • &F - Use factory default

  • B40 - Do asynchronous PPP conversion

  • S83.7=1 - Use data over speech bearer

  • &K44 - Enable CCP compression

  • &J3 - Enable MP

  • X7 - Report DCE side rates

  • S61.3=1 - Use packet fragmentation

  • S0=0 - No auto answer

  • S2=255 - Disable TIES escape

OK ATDI18882638234

Make an ISDN call. For multi-link, the second call is placed to the same telephone number, which is normally what is required by most ISPs. If the remote peer requires a different second phone number, append "+nnnn" (nnnn represents the second phone number).

CONNECT \c

Wait for the CONNECT message from the opposite peer's modem.

\r \d\c

Wait until the end of the CONNECT message.

SAY "Connected; running PPP\n"

Display this message on the screen of the dial-out machine.

Refer to thechat(1M) man page for descriptions of options and other detailed information about the chat script. For an explanation of expect-send strings, refer to "UUCP Chat Script Field".

 		 
 
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