[SIPForum-discussion] Should session version in "o=" line be same for 180 ringing and 200 ok message?

[siddharth sharma]

Hi Guys,

I have one scenario, where my carrier is complaining that their calls are
getting disconnected after few milliseconds.
According to their analysis, they are saying that session version in "o="
line  is not same as in 180 ringing and 200 Ok message.
Because of this, they are sending BYE message.

Is this valid reason?

I have checked message, I have not found any difference.
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