====== mISDN (unsupported) ======
===== Usage =====

!!Note: AstLinux 1.x does not support mISDN anymore. Use DAHDI + Asterisk 1.8 or newer instead((some cards are supported by DAHDI now (hfcmulti by wcb4xxp, hfcpci by zaphfc/dahdi_hfcs).))!!

The 3rd-party dahdi_hfcs (formerly zaphfc) DAHDI driver for single port HFC BRI cards is now included in the AstLinux 1.0.3 release.
----
\\ 

In AstLinux 0.7 [[http://git.misdn.org/?p=mISDN.git;a=shortlog;h=mISDN_1_1|mISDN]] 1.1.9.2 and mISDNuser 1.1.9.1 are used.\\ 
From the user side nothing has changed in using mISDN compared to earlier AstLinux versions:
  * activate ''ISDN_MODPROBE'' in your ''user.conf'' (or ''/mnt/kd/rc.conf'')
  * optionally edit ''misdn-init.conf''
  * edit ''misdn.conf''
===== Problems =====

mISDN 1.1 has a few problems with some of those cheap __single-port HFC-chipset ISDN PCI cards__ (the 4-port HFC-multi cards do work!) when unloading the driver on Linux kernels ≥ 2.6.26. This is __not__ specific to AstLinux ((AstLinux 0.7 uses 2.6.27)). When you use such an mISDN-compatible PCI card and mISDN is loaded, you could see the following issues:
  * ''lspci'' will not work anymore -- you will see something like:\\ ''lspci: Cannot open /sys/bus/pci/devices/0000:00:0e.0/resource: No such file or directory''
  * when you try to do a ''misdn-init stop'' or ''misdn-init restart'' you will get a segfault (with the following "reboot workaround" you can just reboot, instead of restarting mISDN, if needed)
  * on reboot/shutdown you will get a kernel panic (when Linux tries to unload the mISDN driver) -- on some boxes the system might hang forever ((at least on a Soekris net5501 -- a Soekris net4801 stalls for a few minutes, but then finally reboots)), which could be a big problem when you upgrade a box remotely

**A workaround for the reboot issue is:**
  * ''mount -o rw,remount /oldroot/cdrom/''
  * manually edit ''/oldroot/cdrom/os/astlinux-xxx.run.conf'' and append ''reboot=bios'' to the ''KCMD'' line.
  * please note that this is **NOT** included in the AstLinux distributions by default, so it will be overwritten by an upgrade. You must therefore **edit it** again after an upgrade **before** you reboot after that upgrade!

\\ 

//The above issues are still existing when using the mISDN sourcecode from the Digium SVN (from Astlinux 0.7.5 onwards).//