AT&T put their routers on the moon?

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poodad
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AT&T put their routers on the moon?

Post by poodad »

I've got my RPI4/EM7565 router up for testing. I'm seeing RSSI in the -77dB to -85dB range. Speetest.net and fast.com shows me getting 10-12 Mb downloads and 2 up, which I'm thrilled with (my DSL is 3Mb/768k).

What I'm not thrilled with is latency. Both speedtest and fast.com reports my latency at around 1s (as in 1000ms). I ping my employer's VPN port and get 1200ms! I'm using a SIM on an AT&T business account that is set up to use the i2gold APN (static routable IP). I don't need a routable IP. Would a different SIM not using i2gold provide better latency?

Is this to be expected? I noticed that the modem jumps around bands while in operation. Are different bands likely to have less latency?

Do I need to look at trying Verizon?
gscheb
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Re: AT&T put their routers on the moon?

Post by gscheb »

That is really high ping.
Could try different protocol.
Like qmi instead of mbim.
Could also try like ipv6 only or ipv4 only or ipv46 together.
R1250GSA
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Re: AT&T put their routers on the moon?

Post by R1250GSA »

Wow, latency, the silent killer.
I have no ideas for you, just fingers crossed that someone can help fix that.
gscheb
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Re: AT&T put their routers on the moon?

Post by gscheb »

By chance are you using a booster?
poodad
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Re: AT&T put their routers on the moon?

Post by poodad »

gscheb wrote: Sun Oct 18, 2020 8:18 pm By chance are you using a booster?
No. Raspberry Pi4 running OpenWRT. Sierra Wireless EM7565 in a USB3 M.2 enclosure (with extra USB connection for extra power). Two Wilson Electric yagi antennas.
MattB29
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Re: AT&T put their routers on the moon?

Post by MattB29 »

Your latency is terrible. I have read about others that also seem have bad latency with their wireless plans and setups. I have used AT&T wireless LTE for many years now. From there prepaid hotspot offering and now through Crickets Simply data plan and a Netgear LTE router. Through out that time my latency has always been in the 38ms to 41ms range. Even when I tested out a WG3526 build a few months back with a Redpocket data sim (also AT&T) my latency was still below 50ms.

Don't know what to tell you but you might try buying a prepaid data only hotspot plan to test to see if you get better latency from it.

Image
poodad
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Re: AT&T put their routers on the moon?

Post by poodad »

I now believe my huge latency was caused by the modem overheating. I noticed that while I was testing the EM7655 went to 65 degrees.

After powering down for a while and back up, the latencies were back to normal values.
R1250GSA
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Re: AT&T put their routers on the moon?

Post by R1250GSA »

Thats great news.
I look forward to pictures of your heat sink solution!
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