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Post by Fogg on Mar 13, 2023 7:18:51 GMT 12
What’s the cell coverage like out at Great Barrier these days?
Workable?
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Post by ComfortZone on Mar 13, 2023 8:38:28 GMT 12
What’s the cell coverage like out at Great Barrier these days? Workable? Vodafone and 2 Deg(2 Deg uses Vodafone towers out there) both reasonable but there are blind spots, Spark hopeless.
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Post by Fogg on Mar 13, 2023 9:39:23 GMT 12
Ok thanks. I think I’m on Voda for both my phone and Wi-Fi so should be ok then. I recall one year it seemed to disappear at night and come back in the morning - as if it was solar powered. Maybe that’s stopped now.
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Post by ComfortZone on Mar 13, 2023 9:51:39 GMT 12
Ok thanks. I think I’m on Voda for both my phone and Wi-Fi so should be ok then. I recall one year it seemed to disappear at night and come back in the morning - as if it was solar powered. Maybe that’s stopped now. I have an external aerial which helps a bit with the signal don't recall it going off at night. on the western side Katherine Bay and northwards still not much reception. Nagel Cove better than it used to be and typically good signal all around Port Fitzroy. Anchored close-in in the Broken islands is patchy as is Bowling Alley Bay. Have not been round the back for a couple of years, last time there if you were in the centre of Whangapoua you could get signal. but not in the bay at the north end
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Post by Fogg on Mar 13, 2023 11:47:49 GMT 12
Cool thanks. I’m heading towards Fitzroy for a couple of days so it sounds like I should be able to find a signal ok. Cheers.
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Post by ComfortZone on Mar 13, 2023 13:24:11 GMT 12
Cool thanks. I’m heading towards Fitzroy for a couple of days so it sounds like I should be able to find a signal ok. Cheers. more WFB huh have a nice time out there....
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Post by Fogg on Mar 13, 2023 13:32:55 GMT 12
Cool thanks. I’m heading towards Fitzroy for a couple of days so it sounds like I should be able to find a signal ok. Cheers. more WFB huh have a nice time out there.... Exactly. I just couldn’t resist the forecast - perfect sail over today on Fogg’s fav point of sail and then a couple of glamour days forecast for Tue & Wed. Only compromise might be a motor home in light & variable winds but I can live with that! 😊
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Post by Fogg on Mar 13, 2023 13:34:13 GMT 12
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Post by Fogg on Mar 14, 2023 13:34:19 GMT 12
Now able to answer my own question (and for anyone else interested in WFB coverage out here): Using Wireless National modem it’s showing 4-5 bars (out of 5) of 4G signal: Smokehouse Bay Kaiarara Bay
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Post by Fogg on Mar 14, 2023 13:54:25 GMT 12
Also, the scenery is as good as the coverage (but then you guys already know that)… 😊
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Post by Fogg on Mar 15, 2023 10:40:13 GMT 12
Voda in Port Fitzroy itself a bit slower (but still 4-5 / 5 bars strength):
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Post by fish on Mar 15, 2023 10:58:43 GMT 12
I'm not familiar with the jitter. Is that latency?
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Post by Fogg on Mar 15, 2023 11:04:41 GMT 12
They’re closely related. Latency is delay. Jitter us changes to latency. Both degrade video quality. But don’t ask me whether 5 is good or bad!
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Post by Fogg on Mar 15, 2023 11:57:02 GMT 12
And out in the Broken Islands (not quite as good as being somewhere inside):
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Post by DuckMaster on Mar 16, 2023 23:10:34 GMT 12
ping is a specific tool / technology but it has come to mean Round Trip Time - but strictly speaking it is not RTT.
RTT (lets call it ping) is the length of time it takes a packet to reach it's destination PLUS the length of time it takes for an acknowledgement to come back.
latency is the length of time that ONE side of the RTT took. SO you have a latency there and a latency back.
Generally speaking you can divide the ping time in half and that will give you the latency, but strictly speaking that isn't legitimate as you could have an asymmetric path and one path could be congested, or one path could just be physically longer so the speed of light becomes the limiting factor.
delay is the length of time it takes for a message which consist of lots of packets to arrive at the destination
jitter is technically the average of the absolute difference between latency samples - so if you have 1 packet that takes 10ms and the next takes 15ms and the next takes 12ms then it's (|(10-15)| + |(15-12)|)/2 = (5 + 3)/2 = 4ms for a sample size of 3 packets.
it's impossible to measure jitter against latency unless you have an synchronized timing source and that timing is encoded into the packet.
So on a device like that jitter is actually measured against the RTT/ping time. So the device is just counting the # of ms it took to receive a response and doing the maths locally.
Packet loss is another important metric.
Packet loss of less than 1%, avg latency of max 150ms and jitter of max 30ms is acceptable for reasonable Internet performance - once you get outside of these metrics - stuff goes to shit really quickly.
You will find some sites that claim latency is the RTT, but it wasn't defined as that in the beginning. Ultimately it comes down to the determination by the engineer at the time of what they want to call latency. But if you see PING it is safe to assume that they are talking RTT and if you see jitter measured against PING then it is safe to assume that that jitter is the RTT jitter.
It's only when you see latency reported that you might want to did into the technical docs to understand what they are actually measuring.
(I also happen to know that Ookla Speedtest uses RTT, the server is dumb, to make it as fast as possible, all the smarts and calculations are done on the phone.)
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