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binele
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Outbound Proxy and Proxy Server for SIP

Hi, what is the difference between an outbound proxy and a proxy server for SIP?

Why are there 2 fields required for connection sometimes?

I'm asking because my voip provider has provided me sip trunking 20 lines. They have said the outbound proxy needs to be a certain proxy, then the proxy server to be another one.

It seems the calls have issues if the outbound proxy is set differently or not set at all. I experienced call drop outs and difficulty in registration.

Can the provider do that?
TelecommunicationsVoice Over IP

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yarwell

8/22/2022 - Mon
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yarwell

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binele

ASKER
Both of them are not in the LAN.  So I guess the reason why the Outbound Proxy is used in this instance is for policing purposes. I know for a fact that the number of SIP messages to the Outbound Proxy is being controlled and if there's too many, the IP will be blocked for a good ten minutes.

Also, one thing I noticed is that this provider gives back an Unauthorised 404 each time the first invite goes.

Any idea what this is?
yarwell

Might be greylisting, other than that no idea.
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