[SIPForum-discussion] Sip messages generate at which layer of stack?

[Mukul Jain]

Hi,

Will any one please help me to understand that from which layer of sip
stack (transport layer, transaction layer or transaction user), sip
messages get generated?

For example, at which layer INVITE, ACK, CANCEL etc. get generates? Is it
transaction user or transaction layer?

Thanks,
Mukul
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