[asterisk-dev] t.38 passthrough filters redudant packages ?

[Kristijan Vrban]

hmm, ok and what is the reason not to have a Packet2Packet bridging mode
to do the raw pass through? Or it has simply not been built yet? If
so, just after
recvfrom a sendto and that’s all? should be feasible. I'll give it a try.

kristijan

2010/9/10 Kevin P. Fleming <kpfleming at digium.com>:
> On 09/10/2010 08:24 AM, Kristijan Vrban wrote:
>> can it be, that in udptl fax passthrough redudant packages with the
>> same Seq No are not transmitted?
>> I analyzed a pcap from my carrier to asterisk (1.4) and the pcap from
>> asterisk to a linksys spa2102
>> And for exapmle the v21-preamble comming from my carrier with the
>> seqNr. 00032 is always fourfold, but on the passthrough
>> side to the spa2102 has only one v21-preamble with seqnr. 00032. So
>> the passthrough filters the redundance ?
>
> Yes. UDPTL frames are not passed through raw (like RTP frames can be in
> Packet2Packet bridging mode), instead the UDPTL encapsulation is
> removed, missing packets are recovered if possible, and ast_frame
> objects are sent to the other side of the bridge, which encapsulates the
> content in UDPTL again, adding error correction if configured to do so.
>
> --
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> skype: kpfleming | jabber: kfleming at digium.com
> Check us out at www.digium.com & www.asterisk.org
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-dev mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-dev
>