SuSE GmbH

SuSE Support Database

Title: asynchronous PPP via ISDN

----------

Mainpage o Searchform o History o Versions o Categories o Contents
Deutsch

----------

asynchronous PPP via ISDN

Applies to

SuSE Linux: Versions since 4.4

Question:

How is it possible to use asynchronous PPP via ISDN ?

Explanation:

Usually synchronous PPP is used in conjunction with ISDN. However some providers don't offer this since often problems during the PPP handshake arise with it.

i4l also offers modem emulation. Devices: /dev/ttyI0, /dev/ttyI1 .... . You can use the analog PPP scripts as usual with them. These will access the ISDN devices with the normal AT commands.

Solution:

Configure the PPP connection like with analog modems, only that you use another device (see above). This configuration is described for example in the handbook, in several READMEs and in the Support DB.

Stefan Troendle (StefanTroendle@swol.de) wrote a small special howto about this topic :

Enclosed are my two scripts that can be used to establish and cut a connection with asynchronous PPP and ISDN.

I call my provider with Chat and X75, the authentication is performed with PAP. I have removed useifip from /etc/ppp/options, which pppd isn't aware of.

Here are the scripts:

Hint :

If data transfers are interrupted occasionally (e.g. when using ftp or when sending or receiving long mails), you should decrease the block size from 1024 to 512. In order to do this, enter the following into the chat script :
OK AT&B512

----------

See also:

----------

Keywords: ISDN, PPP, ASYNCHRONOUS, PPPD, HANDSHAKING

----------

Categories: PPP , ISDN

----------

Feedback welcome: Send Mail to kfr@suse.de (Please give the following subject: SDB-ppp_async)

----------

Mainpage o Searchform o History o Versions o Categories o Contents
Deutsch

----------

SDB-ppp_async, Copyright SuSE GmbH, Nuremberg, Germany - Version: 24. Feb 1997
SuSE GmbH - Last generated: 07. Oct 1999 17:54:07 by maddin with sdb_gen 1.00.0