Tech-
invite
3GPP
space
IETF
space
SIP
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Examples
Grammars
Presence
⇾
Main
Services
Transaction
Dialog
IMS
U1:
sends the 200 response by using the
Via
header fields (not shown).
P1:
forwards the 200 response by using the
Via
header fields (not shown).
P2:
forwards the 200 response by using the
Via
header fields (not shown).