[SIPForum-discussion] 580 - Precondition Failure

[shiba shankar rout]

*Hi All,

Can anybody tell me

1) What does  580 - Precondition Failure means ?
2) How  to enbale or disable  the Precondition ? Through which attribute or
  which  header ?
3)The **580 - Precondition Failure repsonse  is  to INVITE  request  or
UPDATE request ? How to simulate this ?

Thanks  in Advance,

Regards,
S S Rout**
*
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