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> VoLTE and VoWIFI, for example, are both wrappers over SIP if I'm not mistaken Not wrappers. VoLTE is literally SIP with extensions. And VoWiFi is literally V
by phh 4y ago
> VoLTE and VoWIFI, for example, are both wrappers over SIP if I'm not mistaken
Not wrappers. VoLTE is literally SIP with extensions. And VoWiFi is literally VoLTE over IPSec/IKE with EAP auth, so SIP over IPSec. Really just bog standard stuffs.
> – pretty complex, but still using modern tech
Not sure about "modern", but yeah pretty much every actor uses SIP one way or another. It does have a few old stuff (one SIP extension of VoLTE is to allow SIP-negotiated IPSec tunnel. For HMAC it supports md5-96 and sha1-96 and that's all.), but nothing that makes you scream of over-complication.
- josh2600 4y agoYeah VoLTE and VoWiFi were just getting rolled out when I left telecom. It was all IMS and hacks on top of SS7 and stuff like that. WhatsApp really applied a ton of pressure to telcos and changed the game. Do you remember they an international sms in the US was $.60 per message before whatsapp?
- notpushkin 4y agoWell, relatively modern of course (2000 v. 1981 for SS7 :-)