If, via the sysfs attributed introduced in DAHDI-Linux 2.5.0, a user has
configured spans that do not have contiguous channel numbers, dahdi_scan will
not print several of the span attributes in addition to a bad basechan number.
This patch allows dahdi_scan to try and get the basechan for a span from sysfs
as opposed to calculating based on the number of channels in the previous span
scanned.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Also, always append "/CRC4" on any span where that was specified as an
option.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.astersk.org/svn/dahdi/tools/trunk@9473 17933a7a-c749-41c5-a318-cba88f637d49
Loss of crc4-multiframe alignment on an E1 link is not a condition which
brings the span down. The span will continue to run as long as it can
maintain double frame alignment. Because of this, we cannot place the
LMFA alarm in the usual spaninfo.alarms member, due to userspace
programs using this as a catch-all for a span being up or down.
We can detect the alarm by watching the frame error counter (fecount).
If it continuously increments, the span is configured for crc4, and the
span remains OK (alarms = 0), then we are in loss of crc4-multiframe
state.
In order to test this alarm, you'll need to synthesize a loss of crc4
alignment on the span. You can usually do this by configuring the local
span to use crc4 and the remote end to not use crc4. I used the Fireberd
6000 in my lab to do this.
dahdi-743 & dahdi-420
Acked-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.astersk.org/svn/dahdi/tools/trunk@9458 17933a7a-c749-41c5-a318-cba88f637d49
