[SR-Users] Limiting simultaneous calls

[Stefan Sayer]

o Mino Haluz on 11/21/2011 11:53 AM:
> 1) Is this method per user?
> 2) Another thing is, what happens if the BYE is not received (network
> issue or whatever), will the dialog expire on the kamailio side so the
> dialog count could me decremented? I mean, if the user has just 1
> voice channel, he could not make a call anymore, that's why it should
> be reliable..
if it's acceptable for you to use an external B2BUA, you could send 
the calls through SEMS' sbc, activating session timers there and using 
parallel calls cc_pcalls to limit.

e.g.
sems.conf:
  load_plugins=sbc;session_timer

sbc.conf:
  profiles=limit_calls_sst
  active_profile=limit_calls_sst

limit_calls_sst.sbcprofile.conf:
  call_control=parallel_calls
  parallel_calls_module=cc_pcalls
  parallel_calls_uuid=$fU
  parallel_calls_max_calls=1
  # enable session timers - will refresh
  # even if endpoint doesnt support it
  enable_session_timer=yes
  # refresh every minute
  session_expires=120

or, if you want to control it through some header:
limit_calls_sst.sbcprofile.conf:
  call_control=parallel_calls
  parallel_calls_module=cc_pcalls
  parallel_calls_uuid=$H(P-Parallel-Calls-User)
  parallel_calls_max_calls=$H(P-Parallel-Calls-Max-Calls)
  header_filter=blacklist
  header_list=P-Parallel-Calls-User,P-Parallel-Calls-Max-Calls


hth
Stefan
>
> On Mon, Nov 21, 2011 at 11:43 AM, Alex Balashov
> <abalashov at evaristesys.com <mailto:abalashov at evaristesys.com>> wrote:
>
>     On 11/21/2011 05:42 AM, Mino Haluz wrote:
>
>         I was using cdrtool (prepaid table) and callcontrol to limit
>         concurrent calls. In fact this is only limiting the outbound
>         calls,
>         but I would like to use another mechanism which should limit the
>         inbound calls too. So basically to limit voice channels.
>
>         So is there some reliable method/module how to achieve this?
>
>
>     The 'dialog' module is a common approach to this problem.
>       Organise both inbound and outbound dialogs into profiles, and
>     then get_profile_size() in both your inbound and outbound call
>     processing.
>
>     --
>     Alex Balashov - Principal
>     Evariste Systems LLC
>     260 Peachtree Street NW
>     Suite 2200
>     Atlanta, GA 30303
>     Tel: +1-678-954-0670 <tel:%2B1-678-954-0670>
>     Fax: +1-404-961-1892 <tel:%2B1-404-961-1892>
>     Web: http://www.evaristesys.com/
>
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