[OpenSER-Users] TCP better than UDP??

[Jiri Kuthan]

Well -- this kind of surprises me. I would explain that of myself as the
handset guys were worried about UDP timers in firewalls being set more
aggressively, and addressed that by more frequent keep-alives for UDP
which consume more power, that's still guessing though.

-jiri

At 13:20 12/11/2007, franz.edler at inode.at wrote:
>> I came accros one Nokia-S60 Guideline regarding SIP setting in the
>> NAT/Firewall traversal section which say:"It is recommended to use TCP
>> as the transport instead of UDP since even doubled battery life can be
>> achieved with a UI always connected to a SIP service".
>
>I cannt comment on the battery life issue, but the problem is with IP
>fragmentation. In case a message is fragmented because it exceeds the MTU
>size there is a good chance that the fragmented packets cannot traverse
>the firewall. This is because the port information is not repeated in
>fragmented packets.
>
>regards
>Franz
>
>
>
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--
Jiri Kuthan            http://iptel.org/~jiri/