Hi everyone,
I have a few questions about this type of configuration.
I have successfully set up a PJSIP trunk between FreePBX and a PATTON SN4114. Everything is now working fine, but I don’t fully understand WHY these specific settings below made it work.
My Setup:
PATTON SN4114
- No registration
- No authentication
- All calls are simply pointed to IP address 10.0.0.5 (IP of FreePBX)
FreePBX PJSIP Trunk Settings (via GUI):
- Trunk Name: PATTON_analog
- Authentication: None
- Registration: None
- SIP Server: 10.0.0.6 (IP of PATTON)
- SIP Server Port: 5060
- Outbound Proxy:
sip:10.0.0.6\;lr - Contact User: 123111444
- Match (Permit): 10.0.0.6
- (All other parameters are default.)
What I Observed:
- Without Match (Permit: 10.0.0.6), FreePBX rejects incoming calls from Patton with
401 Unauthorized. Since Patton does not support authentication, it never retries with credentials, and the call fails. - Without Outbound Proxy (sip:10.0.0.6;lr), FreePBX marks the trunk as Unavailable, preventing any outbound calls.
These two settings together make everything work, but I’m trying to understand WHY.
My Questions:
- Doesn’t “SIP Server” already define where the trunk should send traffic? Why is Match (Permit) also needed for incoming calls?
- Why does the trunk become “Unavailable” without Outbound Proxy? Shouldn’t FreePBX still be able to send outbound calls to the SIP Server?
- What exactly does “Match (Permit)” do internally in PJSIP? I assumed it only controlled which IPs are allowed, but it seems to also determine whether the trunk accepts incoming calls.
Thanks in advance for any insights