How does a phone get its config from a tftp server

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Reference no: EM131952476

Assignment: Network Engineering Questions

1. What is DISA? Why would it be used. What are the potential issues that can occur if this is setup?

2. What Telco services provide for a customer (user can configure) the Caller-ID?

3. Contrast ILEC and CLECs. How are the different. Why would someone choose to buy services from one over the other. Who is responsible for the local loop?

4. What is e-911? What advantage does it provide in an organization that is using VoIP to connect multiple offices?

5. Why would a company use a SIP trunk? When would it make sense to use a SIP trunk?

6. What is Caller-ID spoofing?

7. What is the meaningful advantage of a VoIP phone supporting POE as compared to not supporting POE?

8. How does a phone get its config from a TFTP server. How does that work? How does the phone learn about a TFTP server?

9. Be able to explain Major PBX features

a. ACD
b. IVR
c. Least Cost Routing

10. What are the potential issues with using a Hosted PBX that is provide over an Internet connection?

11. What are the potential issues with recording phone calls?

a. Explain what "one party consent" means

12. What is the digital data rate for a standard voice channel?

13. What is in-band or "out of band" signaling? Which one provides better security? How is DTMF used in signaling

14. What is a "dial plan"? How would they be used? Can you write the dial plan for the following:

A. Dial 8 to make a local call
B. Dial 7 to make a long distance call
C. Dial 4 and the 3 digit extension to call a 2nd PBX
D. Only all calls to numbers that begin with 3-8 then followed by any 6 additional numbers
E. Allow the dialing of any 7 digit number, except numbers where the 2nd most significant digit is a 5

15. If analyzing a Wireshark capture of a SIP call, what SIP codes would you expect to see? Assuming the call was successful? What codes would indicate that the call was not answered

16. What is RTP? How often are RTP packets sent? What do RTP packets contain?

17. In a VoIP call, how are SIP, SDP and RTP used?

18. How can you determine if a VoIP phone has successfully connected with the Tribox (other than by making a call)? Where is this info?

19. What is a potential problem with NAT in terms of using SIP trunks?

20. Where can HD Audio be used? SIP trunk, DS0 or POTS line? Explain

21. In a Ring group, what are the two main strategies used to ring a group of extensions?

22. In a properly functioning VoIP PBX system, what is the most common SIP

23. Write a script in Linux to copy all the files from one directory to another directory. How do you launch/execute that script?

24. How can you do the following from a Linux CLI?

- determine the IP address
- set a static IP address
- shutdown the wired Ethernet connection, or start it back up
- Change dir
-shutdown the system
- reboot the system

25. Use Wireshark to examine a VoIP data capture and determine

-Is a phone or SIP trunk registered or trying to Register
-Determine the IP source/destination addresses of SIP traffic
-Determine that a SIP call was successful or not
-Analyze VoIP traffic metrics (jitter, loss packets, latency)

26. Explain what Outbound routes, Trunks, Inbound routes are and how they work

27. What information does a VoIP phone need in order to be used with a PBX?

28. What does "Register" with a PBX mean? Can a VoIP phone make or receive calls if it isn't registered with the PBX?

29. What is a Voice Gateway? How would it be used

30. When a company desires to send a certain out-bound caller-id, such as the company's main phone number, which type of service of traditional telco service would they need to purchase? T1, PRI, POTS Explain your choice

31. Use Wireshark to examine the provided capture file located in Week 13.

32. Write a script that will send the listing of the contents of a directory to a file named Prob33

33. What is a CDR? What info is in it? How might it be used in troubleshooting?

34. What does a CODEC do? How are G.711 and G.729 CODECs different?

35. List 10 big challenges during Free PBX installation and configuration.

Reference no: EM131952476

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