[Freeswitch-users] CCS_RINGING too early

Steven Ayre steveayre at gmail.com
Sat Feb 23 20:38:39 MSK 2013


There are some use-cases.

The main one would be that you might get FS to generate a ringback tone if
you're using ignore_early_media=true since otherwise the caller would never
hear any ringing.

-Steve



On 23 February 2013 17:06, Hynek Cihlar <hynek.cihlar at gmail.com> wrote:

> Is there even a valid use case for Freeswitch to set a channel to RINGING
> before the actual ring is signaled by the far endpoint? What other evidence
> would be helpful to diagnose the issue?
>
> Hynek
>
>
> On Tue, Feb 12, 2013 at 12:03 PM, Hynek Cihlar <hynek.cihlar at gmail.com>wrote:
>
>> When originating a call the respective call channel's call state is set
>> to RINGING right after progress 100 is received.
>>
>> Here's the captured flow:
>>
>> |Time     | <src ip>                              |
>> |         |                   | <dst ip>          |
>> |2.848    |         INVITE SDP (g711A g711U GSM
>> telephone-eventRTP...e-101 CN)          |SIP From: "" <sip:endpoint removed
>> To:<sip:endpoint removed
>> |         |(5080)   ------------------>  (5060)   |
>> |2.848    |         407 Proxy Authentication Required          |SIP Status
>> |         |(5080)   <------------------  (5060)   |
>> |2.849    |         ACK       |                   |SIP Request
>> |         |(5080)   ------------------>  (5060)   |
>> |2.849    |         INVITE SDP (g711A g711U GSM
>> telephone-eventRTP...e-101 CN)          |SIP From: "" <sip:endpoint removed
>> To:<sip:endpoint removed
>> |         |(5080)   ------------------>  (5060)   |
>> |2.850    |         100 Trying|                   |SIP Status
>> |         |(5080)   <------------------  (5060)   |
>> |13.444   |         180 Ringing                   |SIP Status
>> |         |(5080)   <------------------  (5060)   |
>> |13.445   |         183 Session Progress SDP (g711A g711U GSM
>> tele...ne-eventRTPType-101)          |SIP Status
>> |         |(5080)   <------------------  (5060)   |
>> |13.445   |         RTP (g711A)                   |RTP Num packets:230
>>  Duration:4.574s SSRC:0x1E777E26
>> |         |(26056)  <------------------  (19312)  |
>> |13.601   |         RTP (g711A)                   |RTP Num packets:220
>>  Duration:4.419s SSRC:0xA530C519
>> |         |(26056)  ------------------>  (19312)  |
>>
>> After the 100 Trying is received the switch executes
>> switch_channel_perform_set_running_state (switch_channel.c) and the channel
>> call state is set to RINGING and ESL event CHANNEL_CALLSTATE:RINGING is
>> generated.
>>
>> I would expect the channel call state to be set to RINGING only after 180
>> Ringing is received from the far endpoint.
>>
>> Could anybody give me a hint what could be wrong or what steps to take to
>> figure out? I am already out of ideas.
>>
>> Thanks!
>> Hynek
>>
>
>
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