5G roadblock: labor

Mon Dec 30 23:08:52 UTC 2019

On 12/30/19 2:46 PM, Brandon Martin wrote:
> On 12/30/19 5:42 PM, Michael Thomas wrote:
>> Oh, I didn't know that. Seems like it's a relatively new thing. Seems 
>> like they went to a lot of trouble to essentially do what voip does. 
>> Or maybe not? I've been poking around trying figure out what's going 
>> on under the hood with wifi calling, and it seems like they're just 
>> tunneling PSTN bits over the internet. If true, that's certainly a 
>> quick and dirty hack. Maybe they're doing something similar for volte?
>
> My understanding is that VoLTE is signaled using SIP.  I don't know 
> how the media moves.  I think they tried to avoid re-inventing the 
> wheel. Most of the "phone" guys are slinging a lot of inter-network 
> calls via IP these days, anyway.

Yeah, maybe it really is RTP because iirc, VoLTE can use different 
codecs. That would make some sense since a lot of those voice bits are 
going to end up as RTP at some point. I can understand the wifi hack 
since they may not have had the ability to directly deal with customer 
facing RTP from the phones 5 years ago.

Maybe my google-foo is really bad, but it's not been easy to get an 
overview of what's going on under the hood for these. And I'd prefer to 
avoid the 3GPP tar pit.

Mike