Quality of Service Best Practices

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Cayan recommends exploring the use of QoS in locations where the network performance is less than adequate and cannot be changed. Fast internet connections typically do not need this support, but as upload & download speeds decrease, the latency of payment transactions and Point of Sale functions will often increase.

Quality of Service settings in local routing and firewall equipment, where supported, can be used to raise the priority of traffic between the Cayan platform and the stores payment resources, which commonly include the Point of Sale and Cayan CED. Many routers and firewalls today support QoS where messaging between defined resources receive higher priority than other network devices in the location. Often, other resources such as back office servers, manager workstations, VoIP solutions, music services and security systems share bandwidth and impact network performance at the Point of Sale and Cayan CED.

A simple example would be a back-office workstation receiving merchandising updates. If payment resources are not set to have QoS priority within local routing equipment, traffic from the back-office workstation, or any other network device, can take bandwidth away from the Point of Sale & Cayan CED impacting transaction times. By giving the payment and Point of Sale resources priority, you are requesting that messages required to complete a transaction are routed before any other traffic. Cayan recommends consulting with your network equipment and solution providers to take advantage of QoS where possible, to give payment messaging the highest priority.

Symptoms
 
  • VoIP calls experience choppy audio
  • Slow speeds during file Uploads or Downloads
  • Slow payment transactions
  • Latency of Point of Sale or back-office workstation tasks
  • General inconsistency of network speeds and device functions.
    • This may coincide with scheduled or unscheduled activity on one network device that impacts others.

Additional Resources