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Hi Dan,<br>
<br>
There is no capability negotiation, or mapping between SIP and the
h245, I send fixed ones For H263 and AMR:<br>
<br>
<br>
[0]={<br>
capabilityTableEntryNumber = 1<br>
capability = receiveAndTransmitVideoCapability
h263VideoCapability {<br>
qcifMPI = 2<br>
maxBitRate = 520<br>
unrestrictedVector = FALSE<br>
arithmeticCoding = FALSE<br>
advancedPrediction = FALSE<br>
pbFrames = FALSE<br>
temporalSpatialTradeOffCapability = FALSE<br>
errorCompensation = FALSE<br>
}<br>
}<br>
[1]={<br>
capabilityTableEntryNumber = 2<br>
capability = receiveAndTransmitAudioCapability
genericAudioCapability {<br>
capabilityIdentifier = standard 0.0.8.245.1.1.1<br>
maxBitRate = 122<br>
collapsing = 1 entries {<br>
[0]={<br>
parameterIdentifier = standard 0<br>
parameterValue = unsignedMin 1<br>
}<br>
}<br>
}<br>
}<br>
.<br>
<br>
Best regards<br>
Sergio<br>
<br>
Dan Julius escribió:
<blockquote
cite="mid:131b8bd40809090021m697f5836s7067dc3dd73e9230@mail.gmail.com"
type="cite">
<div dir="ltr">Hi, <br>
<br>
I'm experiencing some issues when using Asterisk as a gateway between
3G and SIP clients.<br>
I'm trying to complete a call using h263p as the video codec on the sip
client in order to avoid video transcoding.<br>
For audio I'm using AMR on the 3G side and g711 on the SIP side since
most SIP clients don't support AMR out of the box.<br>
<br>
For some phones this works without a problem while other phones don't
seem to show video depending on the SIP client.<br>
For example: N73 works with X-Lite, but not with OpenPhone. N95 works
with both.<br>
I've traced this down to an issue with the capability exchange,
specifically how capabilities are translated from h245 to SIP.<br>
<br>
Can someone point to which part of the code, Asterisk or libh324M does
the mapping between capabilities?<br>
After reviewing some relevant RFCs and specs, it is not clear to me
what the 1:1 mapping should be - is there any relevant documentation?<br>
<br>
Thanks,<br>
Dan<br>
<br>
<br>
</div>
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