Incomming calls in Grandstream GXP16XX series - Rainbow

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Fernando Cesar da Conceicao

• 15 mai 2025 18:39
• Modifié

Hello ! Outgoing calls using grandstream GXP1625 to Alcatel H3G working normally but incomming calls from HG3 or Rainbow app don't work. The calling stays muted and the status show "ringing" on grandstream device. Is there any incompatibility to use GS GXP16XX registered on openrainbow pabx? Can you help me?

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  Fazal ABIBULLA

  • 20 mai 2025 07:38

  Hi Fernando, Hope you are doing well.

  Thank you for reaching out regarding the incoming call issue with your Grandstream GXP1625 registered on OpenRainbow.

  If you are using the Rainbow Hub, please note that only certain SIP devices are fully compatible. The Grandstream GXP16XX series may encounter connectivity limitations, as outlined in our https://support.openrainbow.com/hc/en-us/articles/360021940099-Generic-SIP-devices link.

  To investigate further, we recommend:

  1. Verifying your device’s firmware is up to date.

  2. Checking SIP/network settings (NAT, firewall, QoS).

  3. Confirming Rainbow Hub configuration aligns with supported devices.

  For dedicated troubleshooting, please create a Support Request (SR) at support@openrainbow.com with details like call logs, network setup, and device configuration. Our team will assist you promptly.
  
  Thanks & Regards,
  Fazal (Rainbow TAC)

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  Fernando Cesar da Conceicao

  • 20 mai 2025 11:08

  Hi Fazal, 

  Thanks for responding.

  The problem was the TLS configuration. I had to set this configuration "SIP URI Scheme When Using TLS" to SIP, instead the SIPS, and choose the "Enable and Forced" SRTP option. It´s working now. 

  Thanks for help.

   

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