mISDN installation as of 2022


I’m running several old Asterisk 1.4 servers with mISDN (hfc_multi) Digium cards.

I am now trying to use one of these cards in a new Asterisk 18 server.

However, it seems that the instructions at mISDN Fast Installation Guide - Asterisk Project - Asterisk Project Wiki are outdated.

What is the procedure nowadays to install and configure mISDN cards?
Should the mISDN Linux kernel modules be built, or should one prefer building from ISDN4Linux · GitHub instead (both mISDN and mISDNuser)?


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The version of mISDN compatible with chan_misdn has not been buildable for at least four years and support for mISDN has been removed completely in Asterisk 19. You would need to switch to chan_dahdi and libpri for ISDN support in Asterisk.

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Thank you very much for the update.

I’m in the process of trying to install dahdi on my Gentoo Linux system, but I’m getting compilation erros such as:

make -f ./scripts/Makefile.modpost
  sed 's/\.ko$/\.o/' /var/tmp/portage/net-misc/dahdi-3.1.0-r3/work/dahdi-linux-3.1.0/drivers/dahdi/modules.order | scripts/mod/modpost -m -a  -o /var/tmp/portage/net-misc/dahdi-3.1.0-r3/work/dahdi-linux-3.1.0/drivers/dahdi/Module.symvers -e -i Module.symvers   -T -
/var/tmp/portage/net-misc/dahdi-3.1.0-r3/work/dahdi-linux-3.1.0/drivers/dahdi/vpmadt032_loader/.vpmadt032_x86_64.o.cmd: No such file or directory
make[2]: *** [scripts/Makefile.modpost:134: /var/tmp/portage/net-misc/dahdi-3.1.0-r3/work/dahdi-linux-3.1.0/drivers/dahdi/Module.symvers] Error 1
make[1]: *** [Makefile:1783: modules] Error 2
make[1]: Leaving directory '/usr/src/linux-5.15.11-gentoo'
make: *** [Makefile:74: modules] Error 2

I’m trying to install dahdi-3.1.0, and I have an open ticket over on Gentoo’s bug tracking system.

You wouldn’t happen to have ever seen this error before?
Is the vpmadt032 driver required to be built even if I don’t have a compatible card?


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