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,
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SIP
Just as with IAX, the SIP configuration file
(sip.conf) contains configuration information for
SIP channels. The headings for the channel definitions are formed by a
word framed in square brackets ([])—again, with the exception of the [general] section, where we define global SIP
parameters. Don’t forget to use comments generously in your
sip.conf file. Precede the comment text with a
semicolon; everything to the right will be ignored.
General SIP Parameters
The following options are to be used within the [general] section of
sip.conf:
allowexternalinvitesIf set to
no, this setting disables INVITE and REFER messages to non-local domains. See thedomainsetting.allowexternalinvites=yes|no
allowguestIf set to
no, this disallows guest SIP connections. The default is to allow guest connections. SIP normally requires authentication, but you can accept calls from users who do not support authentication (i.e., do not have asecretfield defined). Certain SIP appliances (such as the Cisco Call Manager v4.1) do not support authentication, so they will not be able to connect if you setallowguest=no:allowguest=no|yes
allowoverlapIf set to
no, overlap dialing is disabled:allowoverlap=no|yes
allowsubscribeSpecifies whether or not to allow external devices to subscribe to extension status (as set in the
hintpriority). Defaults toyes:allowsubscribe=yes|no
allowtransfersIf set to
no, transfers are disabled for all SIP calls, unless specifically enabled on a per-user or per-peer basis:allowtransfers=no|yes ...
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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.
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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.