Configuration for Non-REGISTER Trunks

[ExternalUser]

We have the following topology:

For our scenario, the customer side PBX will not be REGISTERing with a username/password, but is authorized by its IP address. It is directly connected with the ProSBC via a point-to-point link (over fiber).

We have configured it as follows:

NAP configuration (ERS):

The routing:

Routing test results:

Softswitch side:

However, with the foregoing configuration, an actual incoming call, i.e. call from the Softswitch to the PBX fails. The call trace:

From our understanding of the trace and the other information, this is because:

1. The called number 24022400 does not have an AoR in ProSBC

2. There is also no other information on ProSBC to tell it to send the call to the IP address 172.16.0.2, which is the PBX IP

We understand that the above points would not be an issue if the PBX was sending a registration to the Softswitch. Is it possible to configure ProSBC to work without Registration?

Or how can we set in the routing that incoming calls must be sent to 172.16.0.2 if the ProSBC does not have AoRs for the numbers in question?

[admin]

Hi Sicelo,

Looks to me like you need to check Use Proxy Address in the ERS NAP and put 172.16.0.2 as the value.

I think you can remove everything from the SIP Domain page because that is specifically for registration.

Cheers,
Joshua Puckett
TelcoBridges Support

[ExternalUser]

Thank you. Yes, using the proxy address works

One last question:

• is there a limit to the number of IP interfaces/addresses one can have per physical port?
  We are looking at configuring between 200 and 1000 trunks of the type shown above on our ProSBC box.

[ExternalUser]

I have this Exact Setup but my PBX needs to Authenticate to the SoftSwitch.
I am seeing the Register packets from the PBX hit the Interface of the SBC but the SBC never sends anything back to the PBX which i find very odd. I would expect the SBC to send a 401 message back to pbx but running tbx_cli_tools_remote never shows a response leaving the SBC nor does the PBX wireshark show a response.

Do i need to setup a SIP Domain for the Registration packet to be sent over to the Softswitch?