diff --git a/FAQ/i4lfaq.sgml b/FAQ/i4lfaq.sgml
index 2539a4dc..853481c4 100644
--- a/FAQ/i4lfaq.sgml
+++ b/FAQ/i4lfaq.sgml
@@ -4,7 +4,7 @@
FAQ for isdn4linux
Matthias Hessler ( )
-v2.0.99, 7 August 2005
+v2.0.100, 21 August 2005
If you are reading this FAQ online, you may consider downloading the whole
thing, and reading it offline (much cheaper). To download the latest
@@ -1775,10 +1775,27 @@ id="contr0%contr1"
channels?
-Increase the parameter ISDN_MAX_CHANNELS in
-/usr/src/linux/include/linux/isdn.h and rebuild the isdn stuff. Don't
-forget to create the additional devices with makedev.sh (part of isdn4k-utils)
-or by hand.
+You can adjust the parameter ISDN_MAX_CHANNELS and the ISDN_MINOR* parameters
+in /usr/src/linux/include/linux/isdn.h and rebuild the isdn stuff.
+It is unlikely you have more than 64 physical B channels available, therefore
+you probably want to leave ISDN_MINOR_B and ISDN_MINOR_BMAX as they are.
+
+Your bottleneck are probably the number of potential (logical) network
+connections (ipppX devices). The maximum number for this (ISDN_MAX_CHANNELS)
+is 127, since the minor devices start at 128 (see ISDN_MINOR_PPP) and have to
+end before 255 (ISDN_MINOR_STATUS).
+
+To further increase the maximum number of logical connections you either
+have the possibility to use an additional major (e.g. 44 - not used any
+more) - this requires some small changes to the driver and the installation
+of one ipppd instance per logical connection; or to use only one
+ipppd per physical B channel with external Radius authentication. In the
+first case you have to modify and recompile the driver, in the second case
+you have to modify and recompile ipppd (you'll find some preparations for
+this already in the source code).
+
+Don't forget to create the additional devices with makedev.sh (part of
+isdn4k-utils) or by hand.
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