Below are few more Questions will help you...

What is Dialog?
What is Transaction? How many transaction you can find for INVITE to 200 OK
What is Refer?
What is the difference between call leg and call id?
What is the major difference between stateless and statefull?
How to identify call loop? What are the parameters you will check to know call got looped?
What is the difference between Route and Record-Route?
What is via, Branch, Tag?
What is Early dialog?

Will post more once i have time.. Thanks for using...

SIP Interview Questions

Hi All,

I want to share some sip interview questions with you all.. When you are attending Telecom Interviews using VOIP (SIP), you will definitely get 90% of the below questions from your interviewer.  The Below are very common questions while you are reading but you will get problem if you don't have enough skill on the technology what you chosen.

1. What is VOIP? What is the Common problem you will face while using Voip Service?
2. What is SIP? What is the major discovery in SIP if compare with Other Protocols?
3. What is SIP Protocol Structure?
4.  What are L2 and L3 Layers?
5. What are the general headers you will see in SIP Requests and Responses?
6. How to do SIP conformance Testing?
7. What kind of scripts you know to automate SIP Call flow?
8. How to check usability testing on SIP Phone?
9. How you will do Compatibility testing on Voip?
10. Give me an example when servers send 5XX response?

More Questions are coming soon.. Please wait for some more time.. You will see Very Attractive information in this blog and it will be very useful for you carrier in Voip.

Thanks,
Ramesh Babu T