[SR-Users] Compressing SIP messages

Alex Balashov abalashov at evaristesys.com
Mon Apr 1 16:42:32 CEST 2019

The customary inter-Kamailio solution is jumbo frames (if you control network end-to-end) or TCP.

Sent from mobile, with due apologies for brevity and errors.

> On Apr 1, 2019, at 10:33 AM, Igor Olhovskiy <igorolhovskiy at gmail.com> wrote:
> Hi!
> Was looking on some way to compress SIP signalling between internal servers. But found out, there are no some pre-defined or recommended mechanism of doing this.
> Yes, I found gzcompress module, but it will help only in case of big body, but not whole message itself. Like in some cases you can have 4-5 RR headers, which is already a lot of info.
> What I googled is
> SigComp
> Compact Header form
> As I found, SigComp is really not widely-used method and it support along opensource SIP servers/PBXes is not documented.
> For Compact Header form - is there any way of using Kamailio to compress message this way?
> Maybe also there is a way of having some intermediate proxy-layer software, that will gzip/gunzip SIP signalling in realtime?
> All of this actually cause info in SIP/SDP grows rapidly, unfortunately MTU size is not.
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