5G roadblock: labor
Brandon Martin
lists.nanog at monmotha.net
Mon Dec 30 21:35:12 UTC 2019
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.
--
Brandon Martin
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