[asterisk-users] Question of resiliance

[Kyle Kienapfel]

It's been my experience that when asterisk does a dns lookup, for externhost
or to do a SIP register, it blocks the whole server. Not sure if 1.6 has
that problem or just 1.4 though as my internet has been stable while im
awake these days

On Sun, Aug 30, 2009 at 5:54 PM, Alex Samad <alex at samad.com.au> wrote:

> Hi
>
> I am in the process of move a company from pstn to an asterisk setup.
>
> They had 2 pstn lines - only really needed a max of 2 previously.
>
> Now I have installed a tdm410 to handle the cross over from pabx to voip
> handset.  this has been done, the tdm is now just used to provide a
> backup pstn line - only used as a last resort for outgoing calls - as
> its shared with a fax line.
>
>
> I use 2 voip providers one primarily for local and std and the other for
> mobile calls, all though they can be backups for each other. and then
> the pstn line
>
> originally i had (and still till i get around to changing them) macros
> to dial each interface and macro's that handle trying each voip and then
> pstn in order, this is based around dialstatus (hackled from the
> website).
>
> My problem is when I have had long adsl problems (pain in the back side,
> back to base alarm system) eventually asterisk seems to not want to talk
> to the voip phone - nor does it allow any calls to be placed.
>
> my guess is this
> srvlookup=yes
>
> which I had until recently - decided I don't really need it, my guess it
> asterisk has a problem with name resolution and get stuck, but stuck
> such that call processing can't happen.
>
> snippet of my macro
>
>
> [macro-dial-sipmnf-sippt-pstn]
> ;
> ;       Enter with these
> ;               ARG1 = number to dial
> ;               ARG2 = timeout value
> ;               ARG3 = flag determines if hangup or return on no answer
> ;                       HR = hangup and return (default)
> ;                       RT = return without hangup (must set)
> ;
> ;       Returns with FOUNDME = DIALSTATUS
> ;
> ;
> exten => s,1,Set(GLOBAL(FOUNDME)=ANSWER)
> exten => s,2,Dial(SIP/${ARG1}${SIPMNF},${ARG2})
> exten => s,3,Set(GLOBAL(FOUNDME)=${DIALSTATUS})
> exten => s,4,GotoIf([${DIALSTATUS} = CHANUNAVAIL]?5:12)
> ;
> exten => s,5,Set(GLOBAL(FOUNDME)=ANSWER)
> exten => s,6,Dial(SIP/${ARG1}${SIPPT},${ARG2})
> exten => s,7,Set(GLOBAL(FOUNDME)=${DIALSTATUS})
> exten => s,8,GotoIf([${DIALSTATUS} = CHANUNAVAIL]?9:12)
> ;
> exten => s,9,Set(GLOBAL(FOUNDME)=ANSWER)
> exten => s,10,Dial(${PSTN}/${ARG1},${ARG2})
> exten => s,11,Set(GLOBAL(FOUNDME)=${DIALSTATUS})
> exten => s,12,Goto(s-${DIALSTATUS},1)
> ;
>
>
> Alex
>
>
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