default or selected kernelversion does not have config value CONFIG_ISDN_MPP.
Result is shown for kernelversion 6.9.9
Support generic MP (RFC 1717)
configname: CONFIG_ISDN_MPP
Linux Kernel Configuration
└─>Device Drivers
└─>ISDN support
└─>Old ISDN4Linux (deprecated)
└─>Support generic MP (RFC 1717)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
With synchronous PPP enabled, it is possible to increase throughput
by bundling several ISDN-connections, using this protocol. See
<file:Documentation/isdn/README.syncppp> for more information.
by bundling several ISDN-connections, using this protocol. See
<file:Documentation/isdn/README.syncppp> for more information.