December 2005
Beginner
336 pages
5h 28m
English
Content preview from Voice over IP First-Step
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Chapter 5. Speaking the Gateways’ Languages
What You Will Learn
After reading this chapter, you should be able to
✓ | Explain the need for gateway control languages. |
✓ | Identify characteristics of H.323. |
✓ | List the features of MGCP. |
✓ | Describe the operation of SIP. |
The whole world hasn’t migrated to Voice over IP (VoIP) telephony yet. Therefore, your VoIP networks need a portal to the rest of the world (that is, the public switched telephony network or public switched telephone network [PSTN]). Chapter 1, “Touring the History Museum of Telephony,” introduced a VoIP gateway. Recall that a gateway acts as a threshold between a VoIP network and another type of network (for example, a private branch exchange [PBX] or the PSTN). For example, a gateway might have ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.