[asterisk-users] 180 Ringing missing

[Joshua C. Colp]

On Tue, Dec 1, 2020 at 7:20 AM marek <cervajs64 at 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?

-- 
Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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