My polycom phone ip 501 stuck in reboot cycle. It shows error of 0X4020. When it reboot it shows 3 option. 1) reboot in 10 seconds 2) set up 3) about I tried all options but it doent work and shows error 0x4020 ( config file error). How could I can get start my phone normally??

SOURCE: Polycom Soundpoint IP 501 - URL call is disabled

I get this same problem. The phone icon turn white and "url call is disabled" I can place calls and receive incoming calls, but cant place outgoing calls, unless the phone is rebooted

SOURCE: Polcom phones stop ringing

Dear Sir/Madam,

1) After rebooting you can watch your ftp server and see the phone logging in and logging out. Its doing several things (checking the size of the bootrom.ld and sip.ld files and seeing if an update is necessary, etc etc) that I will go over later. It will reboot a couple of times to finish off the update.

2) After the reboots, lets be absolutely sure and lets check the bootrom and SIP versions.

• Press the Menu button, 2 Status, 1 Platform, 1 Phone. Arrow down to view the BootRom version here.
• Press the Menu button, 2 Status, 1 Platform, 2 Application, 1 Main. You will be able to view the "Version" number here.

SOURCE: just installing polycom 501 phones with nextiva

Ohh this mean, you did not register this extension on your phone system. Create this extension on your phone system. Be sure that password given on Phonesystem is also configured on phone too.

SOURCE: failed to get boot parameters via DHCP

You didn't provide any information about your network which is ALWAYS required to provide any type of help, not to mention a solution.

"Failed to get boot parameters via DHCP, xxx seconds until reboot" simply means that the computer isn't getting an IP address from your router. Setting up your router is another entirely separate topic.


This is pretty simple though, one of three things is happening:

1. Your router is not properly configured to provide DHCP to the phone.
2. Your network cable is bad.
3. Your phone is bad (most likely the RJ45 port since the phone seems to work otherwise).

You can check for bad ports or cables by checking the port status within the router. If the port is lit up, most likely the cable and phone port are fine. This is not 100% though, replacing the cable should always be a consideration even with a lit port.

Testimonial: "thank you"

SOURCE: Polycom Soundpoint IP 501 - URL call is disabled

This in it's most basic description means that the phone is unable to register with the SIP server, most likely for lack of internet connectivity or a firewall blocking the packets.

If you've verified connectivity and opened the proper ports and the phone fails to initialize and still getting “URL Call Disabled” or all of the above parameters are correct, update the firmware for the router. This can usually be done within the router configuration. Then reboot in order, the cable modem or DSL, the router or switch, then the phone. This may solve the problem.

If still having the same issue, confirm in the router configuration for settings such as SIP proxy, gateway, or application layer or any configuration setting for SIP or VOIP. If any of these do exist, make sure they are turned off as these may only confuse or adversely affect many implementations.