I'm not sure I follow - too much Christmas eggnog, perhaps.......
My understanding is that one of the spans is always primary - Asterisk
will get its timing from that span unless no timing signal is present
there, when it will go to the secondary source etc.
Just to avoid any confusion, our connections look like this:
Telus (telco) <-> Nortel PBX <-> Asterisk <-> Allstream (telco)
The Asterisk server is NET to the Nortel, and CPE to Allstream, and
gets its timing from Allstream.
The Nortel is CPE to Telus, and gets its timing from Telus.
On Jan 3, 2006, at 3:34 PM, Casey Boone wrote:
you could try setting the * box to pull timing from each pri connected
to it and set the nortel to be a master for that circuit and see if
that
helps any
Casey
Anthony Rodgers wrote:
> Greetings, everyone, and Happy New Year!
>
> I have a question relating to running two PRIs into a single TE411P.
We
> have been experiencing echo, noisy MOH, poor audio call quality and
so
> forth that started at around the time we introduced the second PRI
into
> the equation. Here is our zaptel.conf:
>
> span=1,2,0,esf,b8zs
> bchan=1-23
> dchan=24
> #clear=1-24
> loadzone = us
> defaultzone=us
>
> span=2,1,0,esf,b8zs
> bchan=25-27
> dchan=48
> #clear=1-24
> loadzone = us
> defaultzone=us
>
> And here is our zapata.conf:
>
> [trunkgroups]
>
> [channels]
>
> context=incoming
> usecallingpres=yes
> echocancel=128
> callerid=asreceived
> usecallerid=yes
> echocancelwhenbridged=yes
> echotraining=500
>
> ; Nortel PBX
> rxgain=2.0
> txgain=-17.0
> group=1
> callgroup=1
> pickupgroup=1
> switchtype=national
> signalling=pri_net
> facilityenable=yes
> channel => 1-23
>
> ; Allstream PRI
> rxgain=-2.0
> txgain=-17.0
> group=2
> callgroup=2
> pickupgroup=2
> switchtype=dms100
> signalling=pri_cpe
> facilityenable=no
> channel => 25-27
>
> musiconhold=default
>
> We are master to the Nortel PBX, which gets its clocking from Telus
(a
> telco), and slave to the Allstream (another telco), from where the
> Asterisk gets its clocking.
>
> We have been through the IRQ/APIC/hyperthreading thing already, and
our
> gain levels were set using ztmonitor. zttest gives Best: 100.000000
--
> Worst: 99.987793 -- Average: 99.998923 after 885 passes. We have
> another, identical server that plays MOH with no problems without a
PRI
> attached (presumably using internal clocking), and that same server
and
> another similar server had no issues for months with only one PRI
> attached (one had the Nortel and one had the Allstream, with an IAX
> trunk between them).
>
> Is it possible that the two PRIs have timing differences between them
> that could cause problems? If so, how best could we resolve them?
>
> Regards,
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