Ubiquiti - UDM + APs - Guess Wireless Affecting POS Traffic

melvinsilva

Infrastructure review

1 - UDM as output to the Internet
2 - 16 and 24 port Ubiquiti Switches
5 - Wireless Access Points

Networks

Managers
POS
Staff
Guest

Wireless Design

The POS and Managers network applies to all access points, in both 2.4 Ghz and 5 Ghz bands.
The Staff network is only for 1 access point in both bands.
When the Guest network is activated, it applies only to 3 access points on 2.4 Ghz.

Problem

If the GUEST network is activated, the POS network traffic is degraded, the tablets often lose communication with the spooler server that sends the print orders and many orders are lost from the spooler to the printers.

Several changes have been applied to correct this error, but only if the GUEST network is turned off in the UDM, POS network works fine.
In the Guest network the following has been done;

Spread the network to only 3 access points.
Restricted the use only for the 2.4 Ghz band.
Activate only during the hours that customers are served.

POS Network Revision

Tablets are Apple
A software called TABIT is used
This software controls all POS devices (iPad Tablets) and printers (EPSON through cable) from a central tablet doing the Spooler function.

Note: In another implementation I have only been able to make the POS network work if I put new dedicated devices only for this network.

Any observations/comments/advises ?

1337

@melvinsilva

Is having wifi hotspots at local resturants still a thing?

Regardless, is there a bandwidth limiter on the guest network? That is a must IMHO.
As I understand you have a cloud POS, in which case you are completely reliant on your internet bandwidth.

PS. I might be wrong but it doesn't sound like you have identified where the problem actually is. Only that you have tried different things without resolving the problem.

jt1001001

@Pete-S do you need 2.4GHz on 3 ap? May be running into co channel interference. Knock 2.4 down to only 1 ap and put on the least congested channel and see if that helps.

scottalanmiller

@Pete-S said in Ubiquiti - UDM + APs - Guess Wireless Affecting POS Traffic:

Is having wifi hotspots at local resturants still a thing?

It is in the US where the cell service is so poor

scottalanmiller

@melvinsilva said in Ubiquiti - UDM + APs - Guess Wireless Affecting POS Traffic:

When the Guest network is activated, it applies only to 3 access points on 2.4 Ghz.

Why limit them to 2.4?

scottalanmiller

@melvinsilva said in Ubiquiti - UDM + APs - Guess Wireless Affecting POS Traffic:

If the GUEST network is activated, the POS network traffic is degraded

Have you checked to see if the network is saturated? Does this happen when it is activated only, or only when guests are there using it too?