[asterisk-users] How do I access the Dialstatus numeric code received?

[CDR]

I need to access number received after a I dial a SIP or H323 call?
suppose I get one of these:

*404 Not found
**486 Busy here
**408 Request Timeout
**480 Temporarily unavailable
**480 Temporarily unavailable
**403 Forbidden (+) **
410 Gone
**301 Moved Permanently
**410 Gone **
404 Not Found (=)
**502 Bad Gateway
**484 Address incomplete*

How do I get the 404, 486, etc.
F.A.
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