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Epmp 3000 high ping — ePMP

Cambium Community



Any development in the epmp 3000 high ping? I have an AP with 22 subscribers and the ping is terrible…

PING 32(60) bytes of data. 
40 bytes from : icmp_req=1 ttl=64 time=22.9 ms 
40 bytes from : icmp_req=2 ttl=64 time=21.3 ms 
40 bytes from : icmp_req=3 ttl=64 time=19.5 ms 
40 bytes from : icmp_req=4 ttl=64 time=18.0 ms 
40 bytes from : icmp_req=5 ttl=64 time=16.5 ms 
---  ping statistics --- 
5 packets transmitted, 5 received, 0% packet loss, time 4006ms 
rtt min/avg/max/mdev = 16.579/19.703/22.960/2.282 ms 

Here is one with 4 SM…

PING 32(60) bytes of data. 
40 bytes from : icmp_req=1 ttl=64 time=5.80 ms 
40 bytes from : icmp_req=2 ttl=64 time=4. 88 ms 
40 bytes from : icmp_req=3 ttl=64 time=3.34 ms 
40 bytes from : icmp_req=4 ttl=64 time=6.08 ms 
40 bytes from : icmp_req=5 ttl=64 time=4.46 ms 
---  ping statistics --- 
5 packets transmitted, 5 received, 0% packet loss, time 4006ms 
rtt min/avg/max/mdev = 3.341/4.914/6.082/0.987 ms

1 Like



Could you please attach Monitor Wireless and Monitor Performance screenshots?

Thank you.

(Ryan Ray)


Hi Fedor,

This is also an issue for us. I had a customer switch from a force 300 on an epmp3000 sector with mixed force 300 and force 200 clients to a pmp450m and latency went from 35+ms to 8. Substantial difference.

1 Like



@Fedor, so you want everything on those screens, or something specific?



I would like to see distance to SMs and Wireless statistics, like retransmission rate and packets per MCSs distribution.

Thank you.



Here are mine:

 SEQ HOST                                     SIZE TTL TIME  STATUS             
    0                              56  64 22ms 
    1                              56  64 136ms
    2                              56  64 19ms 
    3                              56  64 23ms 
    4                              56  64 48ms 
    5                              56  64 56ms 
    6                              56  64 86ms 
    7                              56  64 5ms  
    8                              56  64 25ms 
    9                              56  64 42ms 
   10 172. 19.125.74                              56  64 19ms 
    sent=11 received=11 packet-loss=0% min-rtt=5ms avg-rtt=43ms max-rtt=136ms



cambium PP1122×793 36 KB

cambium sm1122×793 101 KB

cambium ws1122×793 21.1 KB

(Richard B.)



Your first pic shows you have a ton of download and upload interference. That SM will most definitely have higher ping and latency. Locking your upload MCS rate down will help some.



Hello, thanks for reply. We just made it with Sebastian from Cambium. Let see how it works. Thx again.



Here is some shots from my subscriber side…

image2112×1291 148 KB

image976×399 8.62 KB

PING 32(60) bytes of data.
40 bytes from : icmp_req=1 ttl=64 time=43.9 ms
40 bytes from : icmp_req=2 ttl=64 time=22.2 ms
40 bytes from : icmp_req=3 ttl=64 time=20. 7 ms
40 bytes from : icmp_req=4 ttl=64 time=25.2 ms

— ping statistics —
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 20.754/28.043/43.972/9.337 ms

This customer is about 10km from tower… I have a SM 1.5km from tower great stats and same ping…here are the stats

PING 32(60) bytes of data.
40 bytes from icmp_req=1 ttl=64 time=17.6 ms
40 bytes from icmp_req=2 ttl=64 time=21.2 ms
40 bytes from icmp_req=3 ttl=64 time=24.5 ms
40 bytes from icmp_req=4 ttl=64 time=28.1 ms
40 bytes from icmp_req=5 ttl=64 time=55.9 ms

— ping statistics —
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 17.676/29.532/55.979/13.673 ms

image1321×378 20.3 KB

(the computer hu)


Hello We have the same problem with our ping on 3 different epmp3000 sectors.
Registered Subscriber Modules 25

image1461×891 126 KB




Hi Hu — I’m wondering why do you have a mix/match of firmware version on the SM’s?

I mean — I think we are all finding the latency too high and too inconsistent (so I’m not suggesting the firmware mix/match is the cause) but that being said – I’ve always found that having all firmware versions match is always the best chance for things to work correctly. I’m wondering why you are running a mix of firmwares?


(Edu Marques)


Olá estou como o mesmo problema.

Hello I am like the same problem.



A ping of 17-25 MS is the normal operating value for ePMP. You can only slightly improve the result by minimizing retransmission of packets for both the upstream and downstream link. This can be done by reducing the value of the maximum modulation.

!!!also, stable operation requires using the same firmware version on the AP and SM!!!

(Edu Marques)


Only if going to Epmp, like no other network, would a ping of 17-25 be normal.



This is a payment for the ability to provide stable communication for more than 20 clients per sector in any conditions.

1 Like



@Ryan_Ray, so you can use 450m subscriber module with an epmp 3000? The latency improvement is incredible!

(Ryan Ray)


No, we have separate areas that we use ePMP or 450m depending on cost sensitivity / performance needs. Our 450 network constantly performs better, doesn’t need handholding or changing. If I did it all again we would have went 450 for all right off the bat.



@Ryan_Ray, thank you for your response! I am feeling the same way, went all epmp, ptp 550 and we are a bit disappointed in a few areas, especially the ping/latency. The budget was not compatible with the 450 lineup but definitely want to move into that arena soon. If you dont mind me asking, what do you use for your Backhaul solution?

(Ryan Ray)


PTP820 c or s and siklu.

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Epmp 3000 SM High Ping — ePMP



I know that this has been discussed a lot but just wanted to revisit this…

I have a sector with 27 SM connected to it and I am still concerned with the ping between the SMs and sector. My upstream provider gave me an American server , Im in Canada, to test to and my furthest hop sector gets their in 70ms… but when I test the same server from a SM on that sector and it is 98-100 ping. I have been comparing notes with another wisp who uses strictly ubiquiti equipment, AC devices, and has sectors with the same amount of customers and traffic on a sector… when I tested the sm ping to the american server I only have about 20mbps of traffic through this sector. Any insight would be appreciated or if anyone else is seeing this on the epmp 3000. I only have force 300 25 and 19 models that make up my 27 clients.

(Douglas Generous)


Look at your frame usage and the number of retransmissions in both directions. This will affect your ping times as well as bandwidth load in the sector. If you are giving the users in a sector 100mbps connections then you are over provisioned at 8 connections.

I do not even consider complaints of high ping time for off network connections. I do not control other networks so will not entertain those complaints. Setup an Iperf node at your tower, go to the SM and plug directly in. Use Jperf to display the link statistics and ping times and delay jitter.



I agree, I tell my clients that all I can control is the ping times to the gateway of the upstream provider.
I do not offer 100mbps packages, at time of testing there was 15mbps going through the sector, cant remember exact of the frame usage but it was low. retransmission on sector at the time was 1% and the sm that I did testing from was at 1% retransmission. Now am I correct in that if I have a couple SM with higher retransmission they will cause everyone on the sector to experiencing high ping?
I just logged onto the sector and in the performance page in the SM list I have a SM with 85% retransmission but it absolutely has no real reason for it to be at 85%!! This client has great los and no reason for that to be happening…

(Douglas Generous)


Retransmissions will cause high ping on a sector. Most likely is that one with 85% has some interference and this could be as sime as their wifi router has a 5ghz radio set to auto/auto/auto. Could also be an SM from a different sector thats connected to a side lobe of the current sector and is not quite happy. Lots of possibilities.

You can also get high retransmissions if your sector SM power is too high, should be -65ish so close and los links dont have issues.
Gps sync and having the APs far enough apart ( if your tower guy can touch the backs of two oposing antennas then they are too close) and setting your front/back sectors and max distance correctly. If its slightly different then you can have a mess thats hard to track down and even harder to prove that its right. And yes only one sector could be affected and vice versa one sector could cause havoc with many towers.



Thank you for your insight… yes many variables but it has been an uphill battle with alot of the epmp firmware always adding that extra variable and sometimes being the issue. I rebooted the SM that showed 85% retransmission on the sector side and its now 7%?? Have not added to many clients to this sector in many weeks and I had ping times to around 95-100 ping and now up to 170 ping… I will try rolling firmware back and see what happens. Thanks again.



What kind of ping times are you getting on a sector with more than 20 clients?

(Douglas Generous)


Ping times have variables that you can control such as frame ratio, sm distances, long or short guard times, individual signal strength and snr. Compairing mine to yours would never give you even a hint of appropriate times unless you copy my network and the devices within.



I see better latency with the 3000L than I do with the 3000 — go figure. 3000L with latency sub 10ms for many sm. All 3000’s latency is in the 20’s no matter what. Some of my 3000’s are in basically no noise environs too, but latency always high since day one. Th option for 2.5ms tdd windows showed up for a couple of releases then disappeared again — this would drop latency to the teens for sure but obviously broke the thing.



Thank you for your reply… I knew I was not alone in what I am experiencing… same here, low noise enviro but high ping from sm to AP(3000).


#10 did weird stuff with latency, 10ms change higher on some, 10ms lower on some, and exactly the same on others, very odd

What is ping? How to lower ping, how to increase, how to reduce ping in CS:GO, games, Fortnite



Ping is the time it takes to move data on the Internet from the start point to the end point. Measured in milliseconds. Roughly speaking, when you perform an action in the game, it is transmitted to the server, processed, and then displayed on your screen. The delay between pressing a key and displaying the action on the screen is ping. More details in our guide.

Indicators and causes of high ping

  • Under 50ms — ideal ping that is not noticeable during games;
  • 50-100ms — normal ping. When searching for information on the Internet, it is almost impossible to notice the delay, but in some games even such a ping can cause discomfort;
  • 100ms or more — high ping. Websites slow down, and games turn into slideshows.

Main reasons for high ping:

  • ISP. Everything is simple here — the higher the real Internet speed, the lower the ping;
  • Game server. There are two main reasons for this — the quality of the server and its location. If you play from Moscow on servers located in China, then high ping is inevitable.
  • The network card is busy. If you have a perfect Internet connection and the server is in the next room, high ping may appear due to an overload on your computer or network card.

In esports, the problem of ping is still relevant. Some squads have players from different regions, which means that the time of data transfer to the server varies. In the European division of WePlay! Pushka League OG beat Nigma 2-0 despite the two OG players being out of Europe. MidOne played with over 200 ping and SumaiL played with 120 ping.

How to check and lower ping

If you play Dota 2, Fortnite, Tanks, or CS GO, then high ping can affect the quality of the game. Usually in games, the ping indicator is displayed directly on the screen. To check the ping through the command line, you need to press Windows + R, enter cmd, click OK. In the window that opens, you need to use the «ping address» command. To check the ping from your computer to our site, you need to enter: «ping cyber.sports.ru».

Let’s analyze the simplest and most effective ways to lower ping:

  • Check the real internet speed. If it is less than stated, then you should think about changing the provider. You can check here.
  • Choose servers closest to your location;
  • Terminate competing processes through the «Task Manager». Close your browser and stop downloading files before starting the game. This will help offload the network.

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How to get rid of delays in games

What is ping?

What does the term «ping» mean? In online gaming, ping is the time it takes to transfer data from your computer to the server (or another player’s computer) and then back to your computer. This parameter is sometimes also referred to as signal delay between the computer and the server, or lag. Ping is measured in milliseconds (ms).

Ping helps players understand how fast their computer communicates with the game server or other players. The ping test shows players if freezes are possible during the game. The terms «low ping» or «high ping» are used in relation to ping speed. For games where speed and movement are important, low ping is preferred. Players with high ping will experience lag which can affect the outcome of the game. Many online games display your ping as well as other players or servers.

The term «ping» originated during World War II; it was then used to refer to the signal emitted by submarines to measure the distance to other ships in the ocean.

What is ping speed?

The quality of online games is directly related to ping, so it is useful to understand what determines a good ping speed.

As a rule, an acceptable ping should be no higher than 40-60 ms. Pings over 100ms experience noticeable lag, and pings over 170ms some games will disconnect the user. A ping of less than 20ms is capable of providing a game with crisp visuals, fast action and no lag. Each 50ms increase in ping may degrade gaming performance.

However, the ping requirements vary greatly from game to game. It all depends on what game you are playing. For example,

  • First person shooters (FPS) and racing games . Time is of the essence here, so ping no more than 50 ms will allow you to compete with other players.
  • Massively multiplayer online games (MMO) . In such games, higher ping is allowed, in some even higher than 250 ms. However, for real-time player versus player (PvP) scenarios, it is recommended that the ping should not exceed 150ms.
  • Real Time Strategy (RTS) . Such games can be played with a ping of a little less than 200ms, but no more than 150ms is considered optimal.

How to check your ping

There are two ways to check your ping:

Most online games allow you to check your ping while playing. Go to the game settings and evaluate the value of the setting with a name similar to «display statistics and performance» or «display network settings» (the name of the setting may vary in different games). This ping test gives the most accurate estimate of network performance for a particular game and game server.

Ping check on the internet

You can also check the ping on the internet at one of the many sites available for this purpose. These sites look for servers closest to you and report the average ping you can expect to play online.

Why is the ping so high?

There are various reasons for high ping:

    How to reduce ping?

    To reduce ping and optimize your gaming experience, you can take the following steps:

    • Close programs and processes running in the background. Some of these programs may take up memory or initiate processes that require internet access, which slows down the game.
    • Disable updates. Schedule updates for times when the computer is not in use. Performing updates while playing may impact bandwidth due to files being downloaded at inappropriate times.
    • Make sure that no one in your house is occupying the Internet channel, for example, downloading large files. The more connected devices are actively using the Internet connection, the higher the ping will be.
    • Check the connection between the router and the wiring box. Check that all wires are securely connected. Cable connections can loosen over time and need to be tightened.
    • Try moving the gaming device closer to the router or connecting the computer or console with an Ethernet cable directly to the router. Wireless connection may experience packet loss due to encryption and multiple devices connected at the same time. An Ethernet cable provides a more reliable and faster connection.
    • Clear the router cache. Filling the cache can slow down devices. Hard reset your router to clear your cookies and restart your device.
    • Place the router in an open area . Walls and objects can interfere with the wireless Internet connection, so it is recommended to install the router in an open area and check if it is set up correctly.
    • Update the firmware of the router. Lack of required software updates or security features can slow devices down. This is also true for routers, so it is recommended to update its firmware.
    • Switch the router off and on again. Unplug the router’s power cable and wait a minute before plugging it back in. If your configuration includes a separate router and modem, you must turn off and on both devices.
    • Consider buying a new router. Most likely, the router provided by your ISP is not allowing you to use your Internet connection to the fullest. A more advanced router will allow you to increase connection speed and improve Wi-Fi coverage. You can read the guide for setting up a home network.
    • Consider switching to faster internet. If you’ve followed the steps above and are still unhappy with your ping speed, contact your ISP. As a rule, it can detect and fix all potential problems remotely, in particular, it should increase the speed. If there are no connection problems, maybe you should consider switching to another provider? Upgrading to a higher bandwidth internet plan may be the best solution for better gaming performance.

    Whatever game you are playing, following these tips will reduce ping and increase game speed.

    What is frame rate?

    In addition to ping, another important parameter of online games is the number of frames per second (frames per second — FPS). In the context of FPS games, it is also the short name for first-person shooters. The number of frames per second (frame rate) indicates how many frames the video card or monitor can display every second. The higher the frame rate, the more smoothly the image changes and the more clearly the reaction to the player’s actions is carried out. Low frame rates make the game feel like it is stuttering, and the game becomes harder and less enjoyable.

    What is the optimal frame rate for gaming?

    30fps is considered the minimum required for gaming. This is the most common frame rate in console games and some low-end computers. However, most gamers won’t notice a drop in game quality until the framerate drops to 20fps or less.

    60 fps is considered the ideal frame rate. A decent gaming PC should be capable of 60 frames per second for most games, although some games may require different settings. 60 frames per second is also used in conventional monitors and televisions.

    120fps is only available on high-end gaming PCs connected to monitors with a refresh rate of 144Hz. Due to the high hardware requirements and associated costs, this option tends to be used by professional gamers.

    240 fps is the highest possible frame rate, supported only by monitors with a refresh rate of 240 Hz. It is available to a relatively small number of professional gamers due to the high cost of equipment that provides such a frequency.

    In many games, the frame rate is displayed on top of the main image during the game. The frame rate display can be enabled in the video options or in the game settings menu.

    Unable to maintain a completely stable frame rate. It fluctuates, regardless of the performance of the system used and the level of optimization of the game. However, the higher the frame rate, the less noticeable these fluctuations will be.

    The following are common causes of low frame rates:

    • Outdated drivers.
    • Outdated or slow graphics cards.
    • Other programs running on the computer.
    • Game parameters set too high.
    • Using a higher resolution than necessary.

    How to increase the frame rate

    You can take the following steps to increase the frame rate on your PC or laptop:

    Enable Game Mode in Windows 10

    • Click on the Search button and then click on Options.
    • In the search box of the Options window, type «games» and select «Game Mode Settings» from the search results.
    • If Game Mode is not already enabled, enable it by moving the switch to the right. You may have to restart your computer for the changes to take effect.

    Install the latest video driver

    Keeping your system and device drivers up to date will help optimize your computer’s gaming performance.

    Check for Windows Updates

    • Click the Start button and select Settings.
    • Then type «Updates» and select «Check for Updates» from the search results.
    • In the Windows Update window, make sure the latest updates are installed.

    Video driver update

    • Video card drivers should be updated automatically when you check for Windows updates. However, newer graphics card updates may be released.
    • For an Nvidia GeForce Experience graphics card, launch the application and click Drivers at the top of the window.
    • Click Check for Updates to see if there are new updates available.

    Optimize game settings

    • All games are different, but if the frame rate is too low, you can check the game settings screen and reduce the image quality.
    • The settings may have one switch to change the image quality from high to medium, or you may need to adjust separate parameters for viewing distance, shadows, texture effects, and more.

    Reduce the screen resolution

    • You can try to reduce the screen resolution; often it does not depend on the quality of the video.
    • Go to your computer’s Settings, select System, then Advanced Display Settings, and select a lower value from the Resolution menu.

    Update video card

      These measures to reduce ping and increase frame rate ensure a smooth, smooth and enjoyable gaming experience.

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