[asterisk-users] Asterisk and the media path

[David Wessell]

Hi Kevin,

Thank you. Here's the requested information.

1) The Trunk is running 1.6.2.9. Also it's running a2billing.
2) The PBX is running asterisk 1.8.12.0 along with FreePBX.
3) I did directmedia on the trunk and canreinvite on the pbx since
they were different versions.

Thansk
David

On Mon, May 21, 2012 at 11:22 AM, Kevin P. Fleming <kpfleming at digium.com> wrote:
> On 05/21/2012 07:03 AM, David Wessell wrote:
>>
>> I am attempting to get an asterisk server to step out of the media
>> path, but am running into a brick wall. Can someone assist? Here's my
>> setup..
>>
>> Ultimate SIP Provider --->  LCR Trunk  (Asterisk 1.6) ---->  PBX (Asterisk
>> 1.8).
>
>
> In order to be able to know whether any known bugs are interfering with what
> you are trying to do, we need more specific version numbers.
>
>
>>
>> I am attempting to get the trunk to step out of the media stream.
>> There is no NAT involved, all machines have a public IP.
>>
>> In the trunk's sip.conf I have:
>>
>> directmedia=yes
>> directrtpsetup=yes
>
>
> Please turn off directrtpsetup; it's experimental and doesn't always work as
> you'd expect. In theory it is exactly what you want in this scenario,
> though. If you are using Asterisk 1.6.0.x or 1.6.1.x, 'directmedia' won't be
> recognized either.
>
>
>>
>> And on the connection to the pbx I have canreinvite=yes
>
>
> Why 'directmedia' on one side and 'canreinvite' on the other? They are
> synonyms, you should use the same name on both sides.
>
>
>>
>> On the pbx I have the trunk connection set to canreinvite=yes.
>
>
> This is unnecessary, unless the devices on the other side of the PBX are
> also on public IPs and you want the PBX to drop out of the media path as
> well.
>
>
>>
>> In the CLI on the LCR trunk I see:
>>
>>  -- SIP/blahblah-0000000b answered SIP/1722291028-0000000a
>>  -- Native bridging SIP/1722291028-0000000a and SIP/siproutes-0000000b
>>
>> Which would make me think that the lcr trunk is stepping out of the
>> media stream. However when I pull up a tcpdump in wireshark I still
>> see a RTP connection? Can someone point me in the right direction?
>
>
> No, native bridging just means that the media stream will be bridged at the
> RTP layer instead of in the Asterisk core. Whether that is done using a
> Packet2Packet bridge in the RTP stack itself, or pushed out to the endpoints
> (directmedia), it's still a native bridge. However, the fact that you are
> seeing this message means you don't have any of the large number of reasons
> that would impede native bridging (transcoding, recording, etc.).
>
> It seems like you have the configuration set up (mostly) properly, so in
> order to know what is going on you're going to have to post a more complete
> log snippet, including 'sip debug' output.
>
> --
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> Check us out at www.digium.com & www.asterisk.org
>
>
> --
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