On 06/06/2013 05:55 PM, Olivier wrote:
Hi,
I need to rebuild a system which has 4 BRI ports and is connected to
Point-to-multiPoint lines, in a country where telco often "drop lines
for energy savings".
I think the dropped D-channel issue should be handled by a very recent
DAHDI. If there are still issues file a bug. Don't know about PtMP.
I am using ISDN BRI connections for several years now. I have never seen
a problem with down states of the D channel. If there is nothing hooked
up to the S bus it is very likely that the D channel will be down after
a while. When you start the low level driver, the line might still be
down. But when you start Asterisk and DAHDI tries to negotiate a TEI
value, then the line will connect. So far I have never seen a
disconnected state on a BRI-P2MP line while Asterisk is running. To be
precise, I always observed periodic RR frames (typically every 10
seconds) when Asterisk is running for apparently idle lines. I have all
the docs, but I wasn't motivate enough so far to read them and learn
whether disconnected states are possible with active devices.
I'm planning to use latest 11.4.0 asterisk version along with dahdi and
libpri (no misdn).
Which version are recommended for Dahdi and Libpri ?
Probably the very latest you can find. If the latest stable does not
work for you then try an RC of an upcoming version or get master from
git.
As I said, any recent version should be fine.
My main requirements are, beside having calls coming in and out:
- keep a meaningful "pri show spans" status (pri show spans outputs Down
when the line is down (cable unplugged, no q921 traffic, ...))
- avoid sporadic ERROR messages in logs.
Did you have any problems with the line status?
jg
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