Create a new Trunk to MSC

A

AhmedYassine

New Member
Sep 29, 2025
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Hi,


I am trying to add a new gateway to bind the PBX with the MSC on port 5060. Here are the parameters I have:


  • IP: 172.225.10.10
  • Port: 5060
  • Protocol: UDP

I have configured everything on my side, but the status still shows NOREG.


I have checked the routing and confirmed that the port is open, so everything seems fine.


Could you please advise what I might be missing?


Thank you.

1773144274590.png
 
In your screenshot, you clearly disabled the REGISTER option. But you only need it when you set up a provider to use registration vs IP authentication. For IP authentication, it's ok to have no registration.
 
Thank you for the feedback.
I think the issue is that the default SIP port used in the external profile is 5080, not 5060. I will ask the provider if they can align with port 5080.
 
The proxy setting controls your outbound traffic. Not inbound. Most providers expect inbound traffic on port 5060.
 
You would need to post a call SIP log to find out. Without logs, your guess is as good as mine.
 
They are not sending you a response, or they don't know how to send you a response.
In your provider settings (their portal, not your PBX), did you tell them to use port 5080? If not, chances are they are sending the traffic back to you on port 5060.
You also need to whitelist their IP address in the ACL and check iptables to make sure they can reach you.
 
For port 5080, it cannot be used (only ports 5001 to 5064 are allowed from their side). I have already updated the ACL and iptables accordingly.
Do you suggest using another port instead of 5080?
 
You would need to reconfigure your SIP profile to accommodate one of those ports. And open up the firewall to allow traffic to that port.
 
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Hi,
Currently, I am using port 5055 as the SIP source port on the external profile. On the gateway configuration, I am sending traffic to my proxy using destination IP:5060.
The security team has confirmed that port 5060 is open, and I have also verified it using telnet, which confirms connectivity. However, I am still not receiving any response from the destination.
Additionally, I have another PBX system connected to the same proxy, and it is working properly.
Could you please advise what might be missing in my configuration?
Thank you.
 
If you chose to use port 5055, you need to verify that you configured your external profile correctly to use that port and the firewall is open to accept traffic on this port.
 
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