Problems may occur when your Poly phone is connected to a network with unstable internet. One common problem is the “URL call is disabled” error message, often resolved by fixing the network.
Issue
On a Poly desk phone, the error “URL call is disabled” could be caused by:
Unstable internet connectivity: VoIP depends on an active and stable internet connection. If the connection is unstable or down completely, the desk phone won’t be able to communicate with the RingCentral servers.
DNS unable to resolve name correctly: Internet routers need to resolve the server name to an IP address. If the DNS server on your network cannot match the provisioning URL with its corresponding IP address, the desk phone won’t be able to communicate with the RingCentral servers.
Routing issue: Make sure the ports for the RingCentral service are open in your network.
Resolution
Checking the phone's physical connection
Ensure the ethernet cable from the modem or router is connected to your phone’s LAN port.
On the phone, go to Menu > Status > Network > Ethernet. If the LAN port doesn’t show as Active, the phone is not connected to the network.
If your phone is connected to an ethernet outlet, try plugging the phone directly into the modem or router instead.
If this is the only phone connected to the network, try connecting the phone to a different port on the back of the modem/router.
If other phones are connected to the network, see if they are working correctly.
If other phones are working, try swapping the phone that received the error with another one. This will determine if the port the phone used is working or not.
Checking the phone's IP address
If there’s no issue with your desk phone’s physical connection, check your phone’s IP address.
Go to Menu > Status > Network > TCP/IP Parameters > IP.
Confirm DHCP is enabled.
If the phone is not showing an IP address, restart your phone.
After restarting your phone and there is still no IP address, check the router's DHCP settings to see if there are enough IP addresses in the pool.
Note: Your DHCP settings will depend on your router’s interface.
Pinging sip.ringcentral.com
If you’ve verified that the desk phone has LAN connectivity and an IP address, ping sip.ringcentral.com on a computer connected to the same network.
Open your device's command window.
On Windows
i. Click Start and search CMD in the search bar.
ii. Open Command Prompt.
On Mac
i. Open your Finder.
ii. Go to Applications > Utilities > Terminal.
Type “ping sip.ringcentral.com” in the command window.
If you receive a “Request timed out” error, try “ping 199.255.120.146”.
If you can ping the IP address but cannot ping sip.ringcentral.com, there is a DNS server problem.
To fix it, change the DNS in the router's DHCP server settings to Google's DNS server at 8.8.8.8 or the level 3 DNS server at 4.2.2.2. These DNS servers resolve hostnames faster than many DNS servers that belong to ISPs.
There's a routing issue if you can ping neither sip.ringcentral.com nor the IP address.
To fix it, set the port triggering on your router to UDP 5060 - 5090 / UDP 16384 - 16482. Opening these ports on your router will allow your Poly phone to access RingCentral services.