[Freeswitch-users] SIP Multiplexed Trunk as IAX2 or TDM

[John]

It does make a considerable difference if you are running your RTP
through IP encryption (eg IPSec VPN) then the per-packet overhead
becomes a significant factor.  Companies such as NET (www.net.com)
provide switches (VX400, VX900, etc) that run bespoke SIP-like and
RTP-like protocols that merge RTP calls between 2 WAN nodes into single
packets and this can reduce the per-packet overhead of encryption quite
significantly.  The cost is a small additional latency (eg 20-40ms)
while the packets from various calls are aggregated.

John

PS. I have no affiliation with NET.

On 28/01/12 20:26, georg at riseup.net wrote:
>> SIP only has gateways, no trunks. When you're dealing with VoIP, treat
>> SIP like data, not like voice channels.
> Allright, but makes this a difference in practice?
>
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