IOCOMM - Configuration Tasks 2 v.104

Resetting a Serial Port

The IOCOMM web browser provides a simple method of resetting a serial port. This can be useful in situations where an attached device has hung and you wish to reset the particular port without having to re-boot the complete unit. To reset a serial port on the IOCOMM proceed as follows:

On the IOCOMM Main menu, select Special operations then Reset serial ports.
Check the port box(es) for the port(s) you wish to reset.
Select Reset port. The port(s) selected will be reset and you will be returned to the Special operations page.
Select Return to the Main menu.

Using a Modem for Dial-in Operation

Dialling in with PPP/SLIP

Issue a CHAP challenge

Dialling in with PPP/SLIP

Dial-in users run serial line protocols such as PPP or SLIP over links. To configure IOCOMM to accept these connections:

On the IOCOMM Main menu, select the Serial ports configuration option.
Select the port number on which you have attached the modem.
Select Physical parameters.
In the Attached device field, select the down arrow and then select the Asynchronous modem option.
In the Baud rate field, select the down arrow and then select the appropriate setting for the attached modem.
Select Expert.
Set the Character framing option to match those of your modem by selecting the down arrow and then selecting the appropriate setting. An Inactivity timeout can also be set in the same way.
If required, select the appropriate box(es) for Special operations required for attached modems and then select one setting under Flow control parameters.

Select Modem options.

The modem options (initialisation commands) available on this page are listed below: The entries shown to the right of each field are the default settings.

1st init string

[AT ]

Response

[OK ]

2nd init string

[ATV1 ]

Response

[OK ]

3rd init string

[ATS0=1 ]

Response

[OK ]

Dial string

[ATD ]

Response

[CONNECT ]

Modem disconnect

[%D+++%DATH%D ]

Response

[OK ]

IOCOMM is shipped with default standard AT command settings. These default settings will work with many modem types.

If you need to edit commands, replace the text and then select any additional ports to which you wish to write the new configuration.

Note: Initialisation strings should not contain any commands that may cause the modem to pause operation. For example, the save configuration command on some modems.

Select Check here to reset port and make changes immediate.
Select Submit.
Select Return to the Main menu.

Issue a CHAP challenge

When you have set up the IOCOMM port for dial-in facility using a PPP type link, you can have PAP or CHAP type authentication to verify the caller. PAP authentication is based on a procedure using an un-encrypted password, whereas the CHAP procedure uses an encrypted password.

By default PAP or CHAP authentication is not activated. To activate these authentication procedures:

On the IOCOMM Main menu, select Serial ports configuration.
Select the port to which you want to impose the authentication restriction.
Select Access options.
In Access options select one of the following:
Allow automatic PPP detection

PPP uses PAP authentication

PPP uses CHAP authentication

Note: You can select both PAP and CHAP authentications if you wish. The IOCOMM first checks if the user has CHAP facility, if not it goes on to use PAP.
Select Check here to reset port and make changes immediate.
Select Submit.
Select Return to the Main menu.

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Links to Configuration Tasks

`1st init string`	`[AT ]`
`Response`	`[OK ]`
`2nd init string`	`[ATV1 ]`
`Response`	`[OK ]`
`3rd init string`	`[ATS0=1 ]`
`Response`	`[OK ]`
`Dial string`	`[ATD ]`
`Response`	`[CONNECT ]`
`Modem disconnect`	`[%D+++%DATH%D ]`
`Response`	`[OK ]`