Liudvikas-
If you can send me a pcap (anonymized) I can run it through our
media/decoder/packet tools and probably be able to tell you what is
going on.
The pcap can contain multiple RTP streams, SIP, etc as long as the
stream(s) of interest are in there.
-Jeff
Quoting Liudvikas Bukys <[email protected]>:
My company (a SIP equipment manufacturer) has noticed a sudden
flurry of problems related to RTP streams containing some packets
with the wrong number of samples (different from what was
negotiated). Our equipment negotiates 20ms packets, we're seeing
the emission of a few 5ms packets with MARK bit set, before the 20ms
packets start flowing. I theorized that some vendor's SBC or
Media Gateway has released software that causes this.
It has erupted at multiple customers. I thought there was
no commonality of carrier or trunk provider, but today I heard a
report that T-Mobile is definitely implicated and reproducible.
Other sources are possible too.
Has anyone else noticed this?
Does anyone have a good contact for SIP-related matters at T-Mobile?
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