Alternative QoS Setup: Ubiquiti UniFi for CrazyCall

To reduce delays and prioritize to traffic coming in and out of CrazyCall over other applications on the network you can activate the Smart Queue option in UniFi Security Gateway. It’ll resolve the problem of quality when the router or bandwidth gets overloaded.

NOTE: Keep in mind that activating the Smart Queue option may result in reduced maximum throughput (85Mbps for the USG, 250 for the USG-PRO). To resolve such inconveniences we recommend you monitor the available speed when the Smart Queue option is on and compare it to the time when it’s off.

How to activate Smart Queue

1. Go to your UniFi controller’s Settings
2. Select Networks
3. In there, select the WAN network (the one that you’ll be using for your VoIP service)
4. Go to Common Settings
5. Toggle on Enable Smart Queues
6. Click on Pre-populate to run the speed test or perform one on your own
7. After that click on the Enable Smart Queues to see additional Up Rate and Down Rate fields. Here, you can click on PRE-POPULATE to automatically set 80% of the Up and Down bandwidth.
8. Click Save (keep in mind it might force a restart of your USG).

After you’re done with the above, you got the QoS configured on the Security Gateway.

Now we’re going to make sure that traffic is not blocked at the port level by opening a specific set of ports.

How to open ports

1. Go to your UniFi controller’s Settings
2. Select Routing & Firewall
3. Select Firewall
4. Select LAN IN
5. Click on Create a new rule

There you have to set the setting according to the below rules:

• Enabled: On
• Select Before predefined rules
• Action: Accept
• Protocol: TCP and UDP
• Leave the default settings in Advanced
• Source type: Address/port Group
• Address group: Create a new group named CrazyCall_IP with the type being Address and add the list of corresponding IPs to your country based on the below table:

Site	IP range
Global:	13.248.142.203/32
Europe: Frankfurt	52.59.238.8/29
Europe: Poland	46.28.243.96/29
Europe: Ireland	52.209.63.240/29
Europe: Germany	52.59.238.8/29
Asia-Pacific: Singapore	52.220.191.252/30
Asia-Pacific: Sydney	52.65.191.152/30
Asia-Pacific: Mumbai	52.66.194.216/30
America: North Carolina	18.228.88.9/32
America:  North Virginia	52.205.249.160/29
America: Sao-Paulo	18.228.88.9/32

• Port group: create a new group named CrazyCall_port and select Port in the Type option. Then add the following ports:
  • TCP: 443, 5349, 10194
  • UDP & TCP : 3478 + from 10000 to 20000
• Destination type: Select Address/Port Group and set:
  • Address group: CrazyCall_Add
  • Port group: CrazyCall_P
• Save

After you’re done with opening ports your router will prioritize the CrazyCall communication the quality should be on point!

FYI - the UniFi access points and switches will automatically map DSCP value to Wi-Fi Multimedia (WMM) priority, by default. Because of that, the voice is automatically given the highest priority so there are no additional changes that have to be applied.