August 2007
Intermediate to advanced
608 pages
20h 33m
English
Content preview from Asterisk: The Future of Telephony, 2nd EditionBecome 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,
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.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.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.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.
Name
Congestion() — Indicates congestion on the channel
Synopsis
Congestion([timeout])Requests that the channel indicate congestion and then
waits for the user to hang up or for the optional
timeout (in seconds) to expire.
This application signals congestion only to the far end; it
doesn’t actually play a congestion tone to the user. Use Playtones(congestion) to play a congestion
tone to the caller.
Warning
If you use this command without a timeout, you run the risk of
having a channel get stuck in this state. This is not really needed
when you want to indicate congestion to a user. Just use Playtones(congestion) so they hear the
fast-busy, and then Hangup().
Always exits abnormally:
; if the Caller ID number is 555-1234, always play congestion
exten => 123,1,GotoIf($[${CALLERID(num)} = 5551234]?5:2)
exten => 123,2,Playtones(congestion)
exten => 123,3,Congestion(3)
exten => 123,4,Hangup()
exten => 123,5,Dial(Zap/1)See Also
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.