Why recently can't make outgoing calls through Companyflex sip trunk?

[Issue Description]

The Companyflex sip trunk was working fine on your PBX, but recently when you make outgoing calls through the SIP trunk, then received '403 Forbidden' from the SIP provider. 

 

[Applicable Models]

Yeastar S-series PBX

 

[Cause]

SIP provider did some changes on their side probably after 2022, June.

1. They request the INVITE 'Contact' header should be the SIP trunk Username,

2. They request the INVITE should include 'P Asserted Identity' with the SIP trunk DOD number. 

 

[Solution]

1. Please upgrade the S-series PBX firmware.

a. For S-series V2, please upgrade to 30.15.0.115, then download pbxcenter-s_series-1.18.3-0.7.tar and upload it to the PBX App Center->Upload page

b. For S-series V4, please upgrade to 65.16.0.25, then download pbxcenter-s_series_v4-65.2.3-0.2.tar and upload it to the PBX App Center->Upload page

 

2. Set the sip trunk number as the DOD number, the DOD number format should be '+(Country Code)(Area Code)(Number)'. Then set the SIP trunk 'Outbound Parameters->P Asserted Identity' with DOD Number. 

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9 Comments

  • 0
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    Hi Gary,

    thanks for the workaround given above. But I have one more thing:

    When I am trying to upload and install the pbxcenter-s_series_v4-65.1.10-0.4.tar  to our customers s50 v2 with firmware 30.15.0.102 running it says " please upgrade firmware to version 65.16.0.11" which should only be compatible to v4 of the appliance, as you wrote above, and the installation of the pbxcenter was not successful.

    What could we do?

    Greetings and thanks in advance

    Stefan

    Thanks for your support.

  • 0
    Avatar

    Hi Stefan,

    I am sorry that I made a mistake. S50v2 should download pbxcenter-s_series-1.17.9-0.20.tar , I changed the link. You can download and check it. Thanks again for your notice. 

  • 0
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    Gary,

    thank you very much! Outgoing calls are possible again.

     

    Greetings

    Stefan 

  • 0
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    Hi Gary,

    since yesterday again we have problems with outgoing calls and when receiving calls, you can’t hear the calling person. There is no sound. After a Restart you are able to hear again some incoming calls, but after a few minutes, it’s the same problem again.

    Did you hear about some new changes or problems concerning companyflex?

    Greetings

    Stefan

     

    Now I got an update from German Telekom by phone: since Tuesday they do not allow the phonenumber (+492389…) in the header of an outgoing call, now there must be shown the so called Registrierungsrufnummer (+4919929….). Then it should work. Why can’t they tell anyone bout that changes???

    do you know, how I can fix that in the settings of the s50?

     

    Edited by Stefan Feldmann
  • 0
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    New file is updated based on new firmware, please download the new file and test. 

  • 0
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    Hi Gary,

    upgrade to 30.15.0.115 is done, but where can I download pbxcenter 1.18.3-0.7.tar? It doesn't seem to bee a link in your posting above. Even can't find it on the Support page.

     

    Greetings

    Stefan 

  • 0
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    Hi Stefan,

    Click on the  pbxcenter-s_series-1.18.3-0.7.tar  in this article, you will download the file. 

  • 0
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    Hi,

    I have the same problem with the S-Series Hardware Version 5. Is there a fix for that version?

    It's a Yeastar S50i Hardware Version: V5.00

    Edited by Benjamin Morhaus
  • 0
    Avatar

    Hi Benjamin,

    For S-series V5, please upgrade the PBX firmware to 78.16.0.25, then download the file from this link https://update-ys2015-alicloud.oss-cn-hongkong.aliyuncs.com/YeastarSupport/others/pbxcenter-s_series_v5-78.2.3-0.1.tar  and upload it to the PBX App Center->Upload page

     

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