asterisk users - Sep 2007 - Backuping VoIP provider with PRI

Hi list,

My Asterisk config for outgoing calls is the following:

exten => s,1,Dial(SIP/${MACRO_EXTEN}@voipprovider,60,g)
exten => s,n,GotoIf($[\"${ANSWEREDTIME}\" =
\"\"]?pri:hang)
exten => s,n(pri),NoOp(Problems with voip provider trying PRI)
exten => s,n,Dial(Zap/g2/${MACRO_EXTEN},60,g)
exten => s,n(hang),HangUp


in most cases it works well but, if my internet connection is down 
Asterisk tries to Dial voipprovider, but it can't resolve the dns name, 
so.... it waits 60 seconds to jump to the following priority...

Any ideas to solve this problem? I can't use the IP of the provider (it 
has a pool of servers), I try to use dnsmgr without solving the isue

Thanks in advance,

Marc

PD: I have used more sophisticate configs using DIALSTATUS variable, but 
the problem persists

Marc Patino G?mez wrote:
> in most cases it works well but, if my internet connection is down 
> Asterisk tries to Dial voipprovider, but it can't resolve the dns name,
> so.... it waits 60 seconds to jump to the following priority...
> 
> Any ideas to solve this problem? I can't use the IP of the provider (it
> has a pool of servers), I try to use dnsmgr without solving the isue
> 
Why don't you fill the ip addresses to your /etc/hosts file?  In that 
way lookups won't need any dns resolving and still could keep the load 
balancing by having multiple ip addresses to the same SIP hostname.

regards
Adam