[Asterisk-biz] gotta be a better way

[C F]

So the following will do in your case:

exten => 807,1,Set(DEVICE=${CHANNEL:0:$[${LEN(${CHANNEL})} - 5]})
Hope you enjoy making out the code, but it should work.
Anyhow, the documentation is around:
http://www.voip-info.org/wiki-asterisk+variables
You just got to use your creativity/imagination to get it done.


On 11/22/05, Bill Michaelson <bill at cosi.com> wrote:
>  Sorry, I intended to post to users, but realized it went to biz afterward.
> Long story as to why.  I thought it would be silly to post a retraction too.
>
>  Since you've answered (thanks), I might as well complete the thread.  I am
> not trying to determine the device type.  I am trying to determine the
> device identification, like say, "SIP/12345", or whatever.  I use it to
> associate configurable attributes with physical stations.  I noticed that
> channel names are comprised of this device ID with five more characters
> appended, presumably for uniqueness.  My code removes these last five
> characters, and it does in fact work as intended in my application.
>
>  But as I implied, I think it is less than elegant.  And it seems that there
> ought to be a variable that directly represents the value I want, but I
> hadn't found it documented.
>
>  Hence my inquiry.
>
>  Thanks again for your input.
>
>  C F wrote:
>
>  This belongs at asterisk users, if you want some real help you should
> try that list.
> Your code doesn't make sense to me, if all your trying to see is what
> device type is making the call then this will do:
>
> set(DTYPE=${CHANNEL:0:4}) should give you either SIP/ or ZAP/ for those 2
> types.
>
> if you want everyting after the slash ('/') then this will do for
>  No, I want everything before the last hyphen, which seems to mean that I
> want to omit the last 5 characters.
>
>  local, sip, and zap:
> exten => 807,1,GotoIf($[${CHANNEL:0:5} = Local]?20)
> exten => 807,2,GotoIf($[${CHANNEL:0:3} = Zap]?30)
> exten => 807,3,Noop(not zap or local so must be sip)
> exten => 807,4,Set(DEVICE=${CHANNEL:4})
> exten => 807,5,Noop(${DEVICE})
> exten => 807,20,Set(DEVICE=${CHANNEL:6})
> exten => 807,21,Noop(${DEVICE})
> exten => 807,30,Set(DEVICE=${CHANNEL:4})
> exten => 807,31,Noop(${DEVICE})
>
> if you want the above but that device should never contain the hex
> value for the SIP calls, so that all you get is the device from
> sip.conf and not the -abc3:
>  This is closer to what I am seeking.
>
>  exten => 807,1,GotoIf($[${CHANNEL:0:5} = Local]?20)
> exten => 807,2,GotoIf($[${CHANNEL:0:3} = Zap]?30)
> exten => 807,3,Noop(not zap or local so must be sip)
> exten => 807,4,Set(DEVICE=${CHANNEL:4:$[${LEN(${CHANNEL})}
> - 9]})
> exten => 807,5,Noop(${DEVICE})
> exten => 807,20,Set(DEVICE=${CHANNEL:6})
> exten => 807,21,Noop(${DEVICE})
> exten => 807,30,Set(DEVICE=${CHANNEL:4})
> exten => 807,31,Noop(${DEVICE})
>
> The above should give you 1324 for a channel that holds SIP/1234-abc3
>
> On 11/22/05, Bill Michaelson <bill at cosi.com> wrote:
>
>
>  Based on what I've read about Asterisk variables, I'm considering this
> ugly snippet to determine the device from which a call originates in
> order to drive further processing...
>
> exten => 807,1,Set(L=${LEN(${CHANNEL})})
> exten => 807,2,set(L=${MATH(${L}-5)})
> exten => 807,3,noop(${L})
> exten => 807,4,set(DEVICE=${CHANNEL:0:${L}}) ; chop off 5
> chars
>
>
> I strongly suspect that there is a better way.
>
> Eh?
>
>
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