16 Aug
2016
16 Aug
'16
12:42 a.m.
Dear All,
I just have a basic SIP question on re-invite. I wonder if "ACK" is required in
a re-invite scenario, like re-invite -> 200 OK -> ACK. What I've seen is for
some reason, my PSTN doesn't send a "ACK" back to me after my 200 OK
response to their re-invite. I don't know if not sending an ACK in a re-invite is an
allowed behavior. Thanks.
Regards,Jay