Dne 01/12/2020 v 12:58 Joshua C. Colp napsal(a):
On Tue, Dec 1, 2020 at 7:20 AM marek <cervaj...@gmail.com <mailto:cervaj...@gmail.com>> wrote:

    hi,

    after upgrade from Asterisk 11 to Asterisk 13.38.0(chan_sip) (i know,
    its old. customer is very conservative...)

    i have problem with missing 180 Ringing

    flow is easy (PBX -> Asterisk -> SIP SBC)

    Asterisk 11
    PBX - Asterisk
    -> INVITE
    <- 100 Trying
    <- 183 Session Progress
    ( <- RTP -> )
    <- 180 Ringing
    <- 200 OK

    Asterisk 13
    -> INVITE
    <- 100 Trying
    <- 183 Session Progress
    ( <- RTP -> )

    __MISSING RINGING___

    <- 200 OK

    temporarily i solved problem with using "R" param

    R: Default: Indicate ringing to the calling party, even if the
    called party
         isn't actually ringing. Allow interruption of the ringback if
    early
    media
         is received on the channel.

    it changed to

    Asterisk 13 (Dial(${ARG1},300,R)
    -> INVITE
    <- 100 Trying
    <- 180 Ringing
    <- 183 Session Progress
    ( <- RTP -> )
    <- 200 OK

    any ideas why Ringing is missing? any solutions?


Have you compared the signaling in both directions between the two versions to see if there is a difference?

whats your goal with this question?

asking if there are some side effects in incoming call ? (SBC -> Asterisk -> PBX)



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