January 2015
Intermediate to advanced
126 pages
2h 32m
English
Content preview from Getting Started with OpenBTSBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 8. Onward and Upward
Hopefully you’ve completed the book having succeeded at implementing the areas you were interested in. Here are a few jumping-off points for further research and experimentation.
Connecting to the Outside World
To connect your handsets with “real” phones in the outside world, you will need an Internet Telephony Service Provider (ITSP). ITSPs accept the SIP signaling and RTP media coming from your network and bridge them to the PSTN.
Voice
Finding ITSPs for voice service is straightforward. There are already online directories for these companies and a variety of plans are offered from prepaid minutes to flat monthly rates. Inbound phone numbers, or Direct Inward Dials (DIDs), are also offered in the majority of countries around the world. Many of these companies also supply instructions for how to connect to them when using Asterisk and can provide technical assistance for your installation.
SMS
SMS is more difficult. There are not very many ITSPs offering SIP MESSAGE to SMS service. Providers that do offer this service do not usually pair it with a voice DID so a single handset will have a different caller ID when making voice calls than when it sends SMS messages. This situation is improving but for now alternatives are needed.
Other providers offer Short Message Peer-to-Peer (SMPP) gateways or HTTP REST API gateways. Again, availability across all DIDs is unpredictable and some extra glue is needed to connect from SIP MESSAGE to either of these solutions. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.