Solved

Outbound Proxy and Proxy Server for SIP

Posted on 2011-03-03
3
937 Views
Last Modified: 2012-05-11
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?
0
Comment
Question by:binele
  • 2
3 Comments
 
LVL 11

Accepted Solution

by:
yarwell earned 500 total points
ID: 35035435
the outbound proxy is usually one close to you for example on your LAN and it handles all your SIP requests. It can be used for policing and charging purposes.

It is itself a proxy server. Proxy servers in general pass SIP requests on and return responses in a way like SIP routers. HTH.
0
 

Author Comment

by:binele
ID: 35040213
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?
0
 
LVL 11

Expert Comment

by:yarwell
ID: 35043565
Might be greylisting, other than that no idea.
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is a step by step guide on creating single number reach (mobility) for Cisco Call Manager.  After configuring this when someone calls your deskphone after 3-4 rings your cell phone will start to ring.  If you do not answer the call will go to y…
Let’s list some of the technologies that enable smooth teleworking. 
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, just open a new email message. In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

832 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question