Dahdi dummy
Jump to navigation
Jump to search
dahdi_dummy is the timing only dahdi driver for olver versions of asterisk. It's not needed on intel as newer dahdi doesn't need it. On the RPi or ARM platforms it's really useful.
Unfortunately John David McGough, KB4FXC of Internet Technologies, Inc has taken this code, removed the author and renamed it as part of the pirated software known as HamVoIP.
I don't care, I just want this to work on ASL 1.01!
Ok, here's the skinny on how to make this work on an ASL 1.01 system.
- ensure your system is up and going, with the kernel pinned per the readme
- apt-mark hold raspberrypi-kernel-headers raspberrypi-kernel
- apt-get install gcc raspberrypi-kernel-headers make vim git
- vim /usr/src/asl-dahdi-linux-2.11.1/linux/drivers/dahdi/Kbuild remove the # from the dummy file
- cd /usr/src/asl-dahdi-linux-2.11.1
- make
- make install
- echo -e "#needed for rpi timing \ndahdi_dummy" >>/etc/modules # add it to modules.conf
- modprobe dahdi_dummy
- service restart asterisk
Verify :
StPeteRpt*CLI> dahdi show status Description Alarms IRQ bpviol CRC4 DAHDI_DUMMY/1 (source: HRtimer) 1 UNCONFIGUR 0 0 0
Support Files about this
First email about this from september 2019
It looks like John David has renamed dummy to hrtimer, dummy is designed to provide good timing on systems lacking dahdi hardware. I've attached strings of his module and the dummy one I built today, they are virtually identical. Please test this if you have asl1.01 on a rpi. Simply building this seems to fix any studering on asl 1.01 running on a RPi3: bryan@StPeteRpt:~ $ sudo dahdi_test [sudo] password for bryan: Opened pseudo dahdi interface, measuring accuracy... 99.614% 99.594% 99.608% 99.608% 98.476% 99.638% 99.599% 99.601% 99.600% 98.450% 99.602% 99.600% 99.601% 99.600% 98.445% 99.581% 99.621% 99.605% 99.597% 98.478% 99.630% 99.579% 99.626% 99.601% 98.478% 99.630% 99.602% 99.600% 99.601% 98.446% 99.601% 99.580% ^C --- Results after 32 passes --- Best: 99.638% -- Worst: 98.445% -- Average: 99.390271% Cumulative Accuracy (not per pass): 99.967 After insmod of dummy module. bryan@StPeteRpt:~ $ sudo dahdi_test Opened pseudo dahdi interface, measuring accuracy... 99.990% 99.967% 99.991% 99.992% 99.991% 99.992% 99.991% 99.991% 99.991% 99.988% 99.992% 99.991% 99.991% 99.992% 99.991% 99.991% 99.991% 99.990% 99.992% 99.991% 99.991% 99.991% 99.991% 99.991% 99.992% 99.991% 99.991% 99.992% 99.991% 99.991% 99.991% 99.991% 99.991% 99.990% 99.991% 99.992% 99.991% 99.991% 99.991% 99.991% ^C --- Results after 40 passes --- Best: 99.992% -- Worst: 99.967% -- Average: 99.990443% Cumulative Accuracy (not per pass): 99.990 Here it is on an intel server running a pci_radio card: root@Itchy:/home/bryan# dahdi_test Opened pseudo dahdi interface, measuring accuracy... 99.993% 99.986% 99.995% 99.992% 99.984% 99.971% 99.993% 99.990% 99.992% 99.992% 99.991% 99.990% 99.996% 99.990% 99.971% 99.954% 99.994% 99.992% 99.991% 99.995% 99.983% 99.993% 99.992% 99.992% 99.997% 99.990% 99.985% 99.995% 99.990% 99.996% 99.989% 99.993% 99.993% 99.989% 99.997% 99.989% 99.994% 99.996% 99.988% 99.993% ^C --- Results after 40 passes --- Best: 99.997% -- Worst: 99.954% -- Average: 99.989596% Cummulative Accuracy (not per pass): 99.992 It's identical. To build as root: # cd /usr/src/asl-dahdi-linux-2.11.1/linux # export MODULES_EXTRA='dahdi_dummy' # make # insmod /usr/src/asl-dahdi-linux-2.11.1/linux/drivers/dahdi/dahdi_dummy.ko # lsmod |grep dahdi dahdi_dummy 3432 0 dahdi 229561 35 dahdi_dummy crc_ccitt 1771 1 dahdi you will need to do dahdi_genconf and then dahdi_cfg. ASL1.01 is missing this in the service script that starts asterisk. It needs to be added. Restart asterisk #service asterisk restart # dahdi_scan [1] active=yes alarms=UNCONFIGURED description=DAHDI_DUMMY/1 (source: HRtimer) 1 name=DAHDI_DUMMY/1 manufacturer= devicetype=DAHDI Dummy Timing location= basechan=1 totchans=0 irq=0 I'm not on the admin list, so unicast if you have a question.