asterisk users - Aug 2004 - Performance of queues

Hi,

A potential customer would like to be able to do this: If a call comes in
for an employee who is on the phone, allow the front-desk to push the caller
in a queue directly to the employee.  Now, this is easily done by using
queues, but I am curious: What is the performance impact on a system if
_every_ employee (phone) has their own queue. How scalable is that in
comparison to 'regular' dialling ?

Best regards,
Florian

> -----Original Message-----
> From: Florian Overkamp [mailto:florian@obsimref.com] 
> Sent: Monday, August 02, 2004 11:41 AM
> To: asterisk-users@lists.digium.com
> Subject: [Asterisk-Users] Performance of queues
> 
> 
> Hi,
> 
> A potential customer would like to be able to do this: If a 
> call comes in for an employee who is on the phone, allow the 
> front-desk to push the caller in a queue directly to the 
> employee.  Now, this is easily done by using queues, but I am 
> curious: What is the performance impact on a system if 
> _every_ employee (phone) has their own queue. How scalable is 
> that in comparison to 'regular' dialling ?
> 
> Best regards,
> Florian
> 
If the purpose is to allow callers to wait for the person to get off of
the phone then couldn't you just implement a sort of camp-on feature in
the dialplan?  Then the caller can choose to hold for the extension or
hit 1 or something to go to voicemail.  I believe that something like
this should work:

exten => 765,1,SetVar(CALLEDEXTEN=${EXTEN})
exten => 765,2,Dial(SIP/20,20,m)
exten => 765,3,Goto(campon,camp,1)
exten => 765,103,Goto(campon,camp,1)


[campon]
exten => camp,1,Answer
exten => camp,2,Wait(1)
exten => camp,3,Background(campon)
exten => camp,4,Background(silence/3)
exten => camp,5,WaitMusicOnHold(30)
exten => camp,6,Goto(default,${CALLEDEXTEN},1)

exten => 1,1,Wait(1)
exten => 1,2,VoiceMail(b${CALLEDEXTEN})
exten => 1,3,Hangup

I found this in the bug notes of bug # 509.
http://bugs.digium.com/bug_view_page.php?bug_id=0000509

Hope this helps,

Robert Jackson