[SR-Users] Interconnect with Zoom

Matthias Urlichs matthias at urlichs.de
Fri Mar 11 14:32:41 CET 2022

> I haven't heard there is any public SIP interconnect offered by Zoom,

Not "public", but they're offering traditional phone interconnect 
services. If you ask nicely you can get them to set up a BYOC link 
(Bring Your Own Carrier) which is basically encrypted SIP and RTP. 
Reportedly, the ability for customers to set up such interconnects via 
the admin webpage is in the works.

I've since figured out that the solution to my problem is to radically 
limit the crypto algorithms (offered to them *and* accepted from them) 
via SDP. Apparently there's a somewhat-hairy bug in their gateway's 
negotiation setup.

No usable reaction from Zoom support yet, let alone a fix that'd allow 
me to remove that hack; as usual for companies of that size and/or rate 
of growth, their front line support leaves much to be desired.

-- mit freundlichen Grüßen
-- Matthias Urlichs

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