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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Using Templates in Your Configuration Files
There is a little-known secret in Asterisk config files that is so brilliant that we had to devote a little section to it.
Let us say that you have 20 SIP phones that are all pretty much identical in terms of how they are configured. The documented way to create them is to specify the parameters for each. Part of such a sip.conf file might look like this:
[1000] type=friend context=internal host=dynamic disallow=all allow=ulaw dtmfmode=rfc2833 maibox=1000 secret=AllYourSetsAreBelongToUs [1001] type=friend context=internal host=dynamic disallow=all allow=ulaw dtmfmode=rfc2833 maibox=1001 secret=AllYourSetsAreBelongToUs [1002] type=friend context=internal host=dynamic disallow=all allow=ulaw dtmfmode=rfc2833 maibox=1002 secret=AllYourSetsAreBelongToUs
Seems like a lot of extra typing, cutting, and pasting, yes? And what if you decide that you are going to change the context for your sets to another name. Not looking good, is it?
Enter the template. Let’s create the same SIP friends as we did above, only this time using the template construct:
[sets](!) ; <== note the exclamation point in parenthesis. That makes this a template.
type=friend
context=internal
host=dynamic
disallow=all
allow=ulaw
dtmfmode=rfc2833
secret=AllYourSetsAreBelongToUs
[1000](sets) ; <== note the template name in parenthesis. All of that templates
; settings will be inhereted.
maibox=1000
[1001](sets)
maibox=1001
[1002](sets)
maibox=1002This is one of the best kept secrets ...
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