<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="LinuxDoc-Tools 0.9.21"> <TITLE>FAQ for isdn4linux: misc: Miscellaneous </TITLE> <LINK HREF="i4lfaq-29.html" REL=next> <LINK HREF="i4lfaq-27.html" REL=previous> <LINK HREF="i4lfaq.html#toc28" REL=contents> </HEAD> <BODY> <A HREF="i4lfaq-29.html">Next</A> <A HREF="i4lfaq-27.html">Previous</A> <A HREF="i4lfaq.html#toc28">Contents</A> <HR> <H2><A NAME="misc"></A> <A NAME="s28">28.</A> <A HREF="i4lfaq.html#toc28">misc: Miscellaneous </A></H2> <H2><A NAME="misc_standards"></A> <A NAME="ss28.1">28.1</A> <A HREF="i4lfaq.html#toc28.1">misc_standards: Which standards apply to the ISDN protocol layers? </A> </H2> <P>These are the main standards: <UL> <LI> Layer 1: ITU I.430 and ETSI 300 012-1</LI> <LI> Layer 2: ITU Q.921 and ETSI 300 125-1</LI> <LI> Layer 3: ITU Q.931 and ETSI 300 102-1 (plus some changes and clarifications in ETSI 300 403)</LI> </UL> All layers are also described in TBR3. For study, the standards are freely available from <A HREF="http://www.etsi.org">http://www.etsi.org</A>.</P> <H2><A NAME="misc_nonullcable"></A> <A NAME="ss28.2">28.2</A> <A HREF="i4lfaq.html#toc28.2">misc_nonullcable: Can I connect two ISDN devices directly with a kind of "null modem cable"? </A> </H2> <P>This is only possible if one of the cable can run in NT mode (see glossary on what this is: <A HREF="i4lfaq-29.html#glossary_ntmode">glossary_ntmode</A>). Only a few cards allow it, all others need an NTBA or PBX with an internal bus to communicate with each other. See question <A HREF="i4lfaq-3.html#feature_crossedcable">feature_crossedcable</A>.</P> <H2><A NAME="misc_uisdn"></A> <A NAME="ss28.3">28.3</A> <A HREF="i4lfaq.html#toc28.3">misc_uisdn: Can isdn4linux run in parallel to UISDN? </A> </H2> <P>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.</P> <HR> <A HREF="i4lfaq-29.html">Next</A> <A HREF="i4lfaq-27.html">Previous</A> <A HREF="i4lfaq.html#toc28">Contents</A> </BODY> </HTML>
