Firewall requirements

Genrally Cloud Voice will "just work", so if you are experiencing issues you may find this artcile helpful. The phone app for iPhone and Android shouldn't need any changes whilst using it on 5G/4G (LTE) or 3g, but if via WiFi then you need to verify the network router just like desk-phones that are wired.

Easy fix: turn off "SIP ALG"

Some router manufacturers have "SIP ALG" on by default; please turn it off as it will innevitably route the right packets of data to the wrong local IP address!

More detailed settings

Domain name resolution: DNS

Destinations: your ISPs DNS, or feel free to use Cisco anti-physhing 207.67.222.222 and IBM's filtered DNS 9.9.9.9

Ports: UDP/TCP 53

Time server

Destinations: 0.uk.pool.ntp.org & europe.pool.ntp.org

Ports: UDP/TCP 123

Signalling protocol: SIP

Destinations: 217.32.186.0 – 217.32.186.191 & 62.7.201.128/27 & 62.7.201.160/27

Ports: UDP/TCP 5060 – 5075

Media: RTP

Destinations: 217.32.186.0 – 217.32.186.191 & 62.7.201.128/27 & 62.7.201.160/27

Ports: UDP 32767 to 65535

More detailed settings

Cisco Linksys downloads: HTTPS

Destinations: 193.113.10.33 - 34 & 193.113.11.35 - 36

Ports: TCP 443

Panasonic, Polycom & Yealink downloads: HTTPS

Destinations: 193.113.10.10 & 193.113.11.10

Ports: TCP 443

Polycom provisioning server: HTTPS

Destinations: 52.0.183.240 & 54.86.39.219

Ports: TCP 443

Yealink provisioning server: HTTPS

Destinations: 52.71.103.102 & 35.156.148.166

Ports: TCP 443

2N Intercom Licensing : HTTPS

Destinations: licenses.update.2n.cz

Ports: TCP 443

Further testing...

Detailed network reporting for common VoIP SIP traffic can be run with free 3rd-party tools, such as the following:

• Step 1: download http://www.visualware.com/bcs/index.html
• Step 2: run test http://vac.visualware.com/test.html?loc=London,%20UK&url=qualitytestlhr.visualware.com

Feel free to submit a ticket to us here and ask for help to diagnose your devices and network.