[Asterisk-Users] Why would asterisk presume a loop (482 "Loop Detected")?

[Peter J Dean]

We have a SNOM360 (ext 226) configured for redirection (away on  
annual leave) to another SNOM360 (ext 225), being tested from a  
SNOM320 (ext 227) which appears on the surface to be an easy adjustment.

Was receiving the following message,

	"Got SIP response 302 "Moved Temporarily" back from"

of which, I was able to understand and correct by adding the  
following to the sip.conf file,

	"promiscredir    = yes"

Why would Asterisk-PBX get confused and assume a loop existed with  
the redirection? It obviously understands that it needs to redirect  
the call, and actually attempts to get it right and then gets it  
horrible wrong, sending it to the wrong context.

     -- Got SIP response 302 "Moved Temporarily" back from 10.255.6.197
     -- Now forwarding SIP/227-cc31 to 'SIP/ 
225 at sip.bisabicara.swsa.com.au' (thanks to SIP/ 
226-94ec)			                <--- This is what I would expect to work
     -- Got SIP response 482 "Loop Detected" back from  
10.255.6.2							                                                <---  
Asterisk-PBX appears to be having a fit
     -- Now forwarding SIP/227-cc31 to 'Local/225 at from-sip- 
unknown' (thanks to SIP/sip.bisabicara.swsa.com.au-e14f)	<--- And  
drops the redirection into the wrong context.

So for argument sake, I add some additional extension commands to  
permit the call to proceed, not that I would have thought it to be  
necessary. And the redirection works. Not exactly a clean  
redirection, and I would rather resolve the error messages and ensure  
that it does call the correct context - assuming this is what  
Asterisk-PBX should be capable of.

Any ideas? Is this the way it should occur or is Asterisk-PBX miss  
behaving? Or do I have it all wrong?


Asterisk-PBX v1.2.6
SNOM's       v5.3.6
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