Q
Problem solve Get help with specific problems with your technologies, process and projects.

Can you give a quick over view on how SIP differs from HTTP in functionality and what are the proble

Can you give a quick over view on how SIP differs from HTTP in functionality and what are the problems of using PSTN as a back for VoIP?
SIP and HTTP are very similar in structure as they are both text based application layer protocols. HTTP allows for transferring hypertext based files between remote and local systems. SIP allows for setting up and tearing down sessions using any type of media (e.g., voice, video and fax). Many people today that are using VoIP service often have backup PSTN service, or use PSTN service in conjunction with their VoIP service. This is mainly for redundancy and also for toll bypass. There are no real problems with this as long as a proper VoIP phone system which supports these features is chosen.
This was last published in July 2004

Dig Deeper on VoIP Protocols

PRO+

Content

Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchCRM

SearchNetworking

SearchSDN

SearchTelecom

SearchITChannel

Close