Next Previous Contents

28. misc: Miscellaneous

28.1 misc_standards: Which standards apply to the ISDN protocol layers?

These are the main standards:

All layers are also described in TBR3. For study, the standards are freely available from http://www.etsi.org.

28.2 misc_nonullcable: Can I connect two ISDN devices directly with a kind of "null modem cable"?

This is only possible if one of the cable can run in NT mode (see glossary on what this is: glossary_ntmode). Only a few cards allow it, all others need an NTBA or PBX with an internal bus to communicate with each other. See question feature_crossedcable.

28.3 misc_uisdn: Can isdn4linux run in parallel to UISDN?

Yes. Both ISDN packages load the module isdn.o, otherwise the naming conventions are different. Tip: rename Urlichs isdn.o to uisdn.o, and change lib/modules/modules.isdn (or whatever the file is called that lists the modules and is read by the script) accordingly. Happily the default names of the ISDN devices are also different.


Next Previous Contents