How to Add Q Value for Trunk Registration in FreePBX

FreePBX Providers
1

Dear FreePBX Community,

I’m configuring a SIP trunk with a provider using the Sipwise C5 platform, which supports serial and parallel call forking based on Q values in SIP registrations. I need to include a Q value in the SIP Contact header when registering FreePBX to this trunk.

What I Know:

  • Q value (0 to 1.0) prioritizes devices in serial forking.
  • Sipwise defaults to q=-1 if no Q value is set.

Question:
How can I specify the Q value in FreePBX trunk settings (chan_sip or PJSIP)?

For more details on Q values and their usage, see the Sipwise documentation: Sipwise C5 Documentation – Call Forking.

Thanks for your help!

2

You cannot because this is a contact header parameter and you cannot adjust that in Asterisk.

3

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