nanog mailing list archives
Re: 5G roadblock: labor
From: Michael Thomas <mike () mtcc com>
Date: Mon, 30 Dec 2019 14:42:35 -0800
On 12/30/19 1:35 PM, Brandon Martin wrote:
On 12/30/19 4:14 PM, Michael Thomas wrote:The latency argument is what interests me. Supposedly 4G's latency and jitter are tough on voip. If that improves there is just no reason for TDM to phones which is a significant development because cell phones are probably the largest deployment of old style PSTN stuff these days as landlines wither and die. I would think that carriers would embrace that since it would be a cost-down, but I'm sure I'm wrong since that would be admit defeat to IP.VoLTE is already essentially VoIP, including packet switched media, with some MAC layer QoS guarantees as I understand it. Now, maybe those MAC layer guarantees essentially amount to a dedicated OFDMA sub-carrier during a voice call. That I cannot speak to as I'm not intimately familiar with the LTE/LTE-A air interface.I can say that plain ol' best-effort LTE data services are generally sufficient for VoIP in my experience if you have "good coverage". That means what I'd generally consider "toll-grade" quality in terms of latency and, more inmportantly, jitter. SSH is similarly quite usable generally. If you're on the fringe of a cell or have a cell that's overloaded, YMMV.
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?
Mostly what I want in the future is a dollop of EF QoS bits and let me determine how to use them...
Mike
Current thread:
- Re: 5G roadblock: labor, (continued)
- Re: 5G roadblock: labor Matthew Petach (Dec 30)
- Re: 5G roadblock: labor Mark Tinka (Dec 30)
- RE: 5G roadblock: labor Keith Medcalf (Dec 30)
- Re: 5G roadblock: labor Brandon Martin (Dec 30)
- Re: 5G roadblock: labor Shane Ronan (Dec 30)
- Re: 5G roadblock: labor Matt Hoppes (Dec 30)
- Re: 5G roadblock: labor Mike Hammett (Dec 30)
- Re: 5G roadblock: labor Ben Cannon (Dec 30)
- Re: 5G roadblock: labor Michael Thomas (Dec 30)
- Re: 5G roadblock: labor Brandon Martin (Dec 30)
- Re: 5G roadblock: labor Michael Thomas (Dec 30)
- Re: 5G roadblock: labor Brandon Martin (Dec 30)
- Re: 5G roadblock: labor Michael Thomas (Dec 30)
- Re: 5G roadblock: labor Christopher Morrow (Dec 30)
- Re: 5G roadblock: labor Michael Thomas (Dec 30)
- Re: 5G roadblock: labor Shane Ronan (Dec 30)
- Re: 5G roadblock: labor Mark Tinka (Dec 30)
- RE: 5G roadblock: labor Marshall, Quincy (Dec 30)
- [OFF-TOPIC detour] Re: 5G roadblock: labor Karl Auer (Dec 30)
- Re: 5G roadblock: labor Mark Tinka (Dec 30)
- Re: 5G roadblock: labor Mike Hammett (Dec 30)