asterisk users - Feb 2009 - Asterisk with Internet connectivity

Hi!

I have a setup with Asterisk in front of a PBX connected with ISDN to 
the PSTN and to the PBX. This Asterisk (a old 1.2 instance) is doing 
ENUM for outgoing calls and allows incoming calls per SIP.

Recently the IP connectivity for this location was down the whole 
telephony was down too - not even incoming calls did work. This is 
really strange as incoming calls from PSTN are routed directly to the 
PBX without any IP needed, ISDN to ISDN.

Once the IP connectivity was reestablished everything worked fine again.

So I wonder what could be the reason that Asterisk blocked all the 
telephony.

thanks
klaus

Klaus Darilion a ?crit :
> Hi!
>   
Hallo
> I have a setup with Asterisk in front of a PBX connected with ISDN to 
> the PSTN and to the PBX. This Asterisk (a old 1.2 instance) is doing 
> ENUM for outgoing calls and allows incoming calls per SIP.
>
> Recently the IP connectivity for this location was down the whole 
> telephony was down too - not even incoming calls did work. This is 
> really strange as incoming calls from PSTN are routed directly to the 
> PBX without any IP needed, ISDN to ISDN.
>
> Once the IP connectivity was reestablished everything worked fine again.
>
> So I wonder what could be the reason that Asterisk blocked all the 
> telephony.
>   
I'm thinking about a DNS problem which make Atserisk reacting very slow. 
Especially if you're EP are SIP/IAX Phones.

-- 
Daniel

2009/2/25 Klaus Darilion <klaus.mailinglists at pernau.at>
> Hi!
>
> I have a setup with Asterisk in front of a PBX connected with ISDN to
> the PSTN and to the PBX. This Asterisk (a old 1.2 instance) is doing
> ENUM for outgoing calls and allows incoming calls per SIP.
>
> Recently the IP connectivity for this location was down the whole
> telephony was down too - not even incoming calls did work. This is
> really strange as incoming calls from PSTN are routed directly to the
> PBX without any IP needed, ISDN to ISDN.
>
> Once the IP connectivity was reestablished everything worked fine again.
>
> So I wonder what could be the reason that Asterisk blocked all the
> telephony.
>
> thanks
> klaus
>
> Asterisk is using dns resolution, when he is unable to reach dns server *
freezes, it's a know issue, this can be avoided if you point asterisk to
your local dns service (inside private network)
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On 25 Feb 2009, at 10:38, Klaus Darilion wrote:
> I have a setup with Asterisk in front of a PBX connected with ISDN to
> the PSTN and to the PBX. This Asterisk (a old 1.2 instance) is doing
> ENUM for outgoing calls and allows incoming calls per SIP.
>
> Recently the IP connectivity for this location was down the whole
> telephony was down too - not even incoming calls did work. This is
> really strange as incoming calls from PSTN are routed directly to the
> PBX without any IP needed, ISDN to ISDN.
>
> Once the IP connectivity was reestablished everything worked fine  
> again.
>
> So I wonder what could be the reason that Asterisk blocked all the
> telephony.
Look in the log? Recreate the incident and put debugging on?