[Freeswitch-dev] CALEA Solution

M. Ranganathan mranga at gmail.com
Sun Jul 29 16:44:31 MSD 2012


CALEA is not a feature. It is a requirement. CALEA is actually simpler
than one might suppose.

CALEA needs to comply with ATIS 1000678. ATIS specifies the message
formats and protocol used to deliver signaling and media to a law
enforcement endpoint. You cannot just send whatever you want to a LEA
and be CALEA compliant.

 To meet requirements, one needs to format SIP messages using the
format specified in ATIS 1000678 and send it off to a Law Enforcement
Endpoint along with the RTP. There are two ways to accomplish this :

- Direct Signal reporting - i.e. encapsulate SIP messages and send off
to LEA and stream RTP messages and send off to LEA (corresponding to
SIP messages). This is by far the simpler solution.

- Mapped Reporting i.e. map SIP to a common format that applies across
all VOIP protocols. This is very complex and quite a pain in the
tookus. I am not even sure if the thing can be made to work.

i.e. one does not need to record sessions or convert into event
management service etc.

Just thought I'd pass along some useful information.

On Sat, Jul 28, 2012 at 1:35 PM, Abdul Hakeem <alhakeem at gmail.com> wrote:
>
> I am looking at it from the perspective of a separate full-blown events
> management server to control multiple FS boxes.
> Having looked at mod_shout and the Telecast application, it seems to fit in well
> with the ESL modules and the ability to create a custom variables that the
> fs_cli command such as   /filter Event-name......can't satisfy.
> It's not just for CALEA purposes only, it could be a great CRM tool.
>
>
> -----Original Message-----
> From: freeswitch-dev-bounces at lists.freeswitch.org
> [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Brian West
> Sent: Saturday, July 28, 2012 2:50 PM
> To: freeswitch-dev at lists.freeswitch.org
> Subject: Re: [Freeswitch-dev] CALEA Solution
>
> What is so wrong with record session?
>
> --
> Brian West
> brian at freeswitch.org
> FreeSWITCH Solutions, LLC
> PO BOX PO BOX 2531
> Brookfield, WI 53008-2531
> Twitter: @FreeSWITCH_Wire
> T: +1.213.286.0410  |  F: +1.213.286.0401  |  M: +1.918.424.WEST
> iNUM: +883 5100 1286 0410
>
> On Jul 25, 2012, at 4:31 PM, Abdul Hakeem <alhakeem at ipextelecom.net> wrote:
>
>> I derive no consolation from this disclosure.
>> If anyone is skilful enough to tackle this, or an offer on the building
> blocks,
>> please don't hesitate to contact me.
>> Cheers,
>> AH
>>
>> -----Original Message-----
>> From: freeswitch-dev-bounces at lists.freeswitch.org
>> [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of Ken Rice
>> Sent: Wednesday, July 25, 2012 9:24 PM
>> To: freeswitch-dev at lists.freeswitch.org
>> Subject: Re: [Freeswitch-dev] CALEA Solution
>>
>> This is something I doubt you would ever see a complete opensource solution
>> on... The amount of time and effort plus complaince issues make it iffy
>> thing... Most people are actually better off actually finding one of the
>> CALEA indemnity companies and subscribing to their services
>>
>>
>> On 7/25/12 3:16 PM, "Abdul Hakeem" <alhakeem at gmail.com> wrote:
>>
>>> I was thinking in the form of a Web interface via sockets (ESL module) or
>>> without sockets via the FS_IVRD tool.
>>> It would be nice to plug it into a CMS solution like Joomla...etc.
>>> The whole idea is to have a professional CALEA solution where users can plug
>>> in
>>> something like an RSS clients or anything else for reporting purposes.
>>>
>>> -----Original Message-----
>>> From: freeswitch-dev-bounces at lists.freeswitch.org
>>> [mailto:freeswitch-dev-bounces at lists.freeswitch.org] On Behalf Of M.
>>> Ranganathan
>>> Sent: Wednesday, July 25, 2012 5:57 PM
>>> To: freeswitch-dev at lists.freeswitch.org
>>> Subject: Re: [Freeswitch-dev] CALEA Solution
>>>
>>> TCPDump will have a hard time with encrypted communications (SIP over
>>> TLS + SRTP ).
>>>
>>> On Wed, Jul 25, 2012 at 12:46 PM, Michael Collins <msc at freeswitch.org> wrote:
>>>> Actually, this might be a good topic for conversation on today's call once
>>>> DRK is done discussing Windows FW stuff. Let's see how the conversation
>>>> goes.
>>>>
>>>> -MC
>>>>
>>>>
>>>> On Wed, Jul 25, 2012 at 9:41 AM, Ken Rice <krice at freeswitch.org> wrote:
>>>>>
>>>>> tcpdump
>>>>>
>>>>>
>>>>>
>>>>> On 7/25/12 11:39 AM, "Abdul Hakeem" <alhakeem at ipextelecom.net> wrote:
>>>>>
>>>>>
>>>>> Hello,
>>>>> Can anyone recommend a CALEA solution for Freeswitch.
>>>>> Cheers,
>>>>> Abdul Hakeem
>>>>>
>>>>> ________________________________
>>>>> _________________________________________________________________________
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>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> 
>>>>> 
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>>>>>
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>>>>>
>>>>> 
>>>>> 
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>>>>
>>>>
>>>> --
>>>> Michael S Collins
>>>> Twitter: @mercutioviz
>>>> http://www.FreeSWITCH.org
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>>>>
>>>>
>>>>
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>>>> 
>>>> 
>>>>
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>>>
>>>
>>>
>>> --
>>> M. Ranganathan
>>>
>>> _________________________________________________________________________
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>>> 
>>> 
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>>
>>
>>
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>
> _________________________________________________________________________
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>
> 
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-- 
M. Ranganathan



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