On Thu, Jul 7, 2016 at 2:28 PM, Volkan Hatem <vol...@hatem.net> wrote:

> In fact, these were the cases where I doubted the reasoning behind "no
> retransmission over TCP/TLS" for INVITE etc when you absolutely need it.
>

We actually always use UDP like re-transmits even when sending SIP messages
over TCP or TLS. There are enough implementations that connect TCP or TLS
interface with UDP using a stateless proxy which make it necessary. Also,
in cases of IP connectivity disruption there is no way to find if the last
message sent over TCP or TLS was actually delivered.

Regards,
_____________
Roman Shpount
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