[asterisk-users] Asterisk 10/1.6.1 and Dahdi/Libpri compatilities in BRI /PtmP

[Michael Keuter]

Am 21.06.2012 um 18:05 schrieb Richard Mudgett:

>> My previous message was incomplete.
>> 
>> 
>> On thing to note is I had to forbid hfcmulti in modprobe.d in the
>> second box to comply with a warning from dahdi. Without that, I could
>> see this line in the output of lsmod:
>> mISDN-core  hfcmulti
>> 
>> 
>> 1. What is the root cause that makes a board change its sync source ?
>> How can I check this ?
> 
> I would think layer 1 going down.  Many European telcos for BRI PTMP lines
> drop layer 2 and then layer 1 to conserve power.
> 
> Is the switching of clock sources causing a problem?
> 
>> 2.  How can I get rid of these alarms ?
> 
> See the chan_dahdi.conf.sample file about the following options.
> 
> You could use the layer1_presence option to make Asterisk ignore those
> alarms.
> 
> You could use the layer2_persistence option to keep layer 2 up.  To use
> this option however, requires using libpri SVN 1.4 branch code as current
> released versions do not support the option.  Using the layer2_persistence
> option restores behavior that was removed for better Q.921 conformance for
> PTMP after libpri v1.4.10.2 and is why you are seeing a behavior difference
> between versions.

Hi Richard,

any plans when libpri 1.4.13 will be released?

Michael

http://www.mksolutions.info




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