20 Most Recent Polycom SoundPoint IP 550 IP Phone Questions & Answers

Plug the phone in and allow it to boot up. Once the home screen is displayed, press and hold the 4, 6, 8, and * keys for about three seconds, or until you hear an audio alert and the phone asks you for a password. Enter 456 (default Admin password) and the phone will default itself. If the password has been changed, and 456 does not work, enter the MAC address of the phone as the password. Entering the MAC address of the phone will only reset the Admin password to the default, so it will probably be necessary to repeat this procedure, entering 456 the second time, to factory default the phone.

Are you using this as a stand alone unit or configured for an Asterisk server? You say you got a new modem, so are you using the same router? If not, you may need to open some ports using port forwarding rules. How that is done depends on the type of router.

This sounds like an RTP stream issue. While SIP runs on port 5060 by default, the actual audio is run on much higher ports, 10000 and up. If your pbx system is not on a public address and you are forwarding traffic to your pbx via a router, check the RTP port range in your pbx and make sure you are forwarding those ports correctly. By putting the call on hold, you stop sending out audio traffic restart sending audio when you pick the call back up. By forwarding the entire RTP range to your pbx, this should fix your issue.

Gene,
The computer connectors are so designed that only the correct can be connected to the correct socket. So if it fits it is meant for that socket.
At boot up please press F2 and enter the BIOS. Here look for Boot up sequence. Your PC seems to the set to boot up from a LAN server. Change it to HDD.
You do need a router. Whether a wired or a wireless is your choice.

On the phone, press the menu button, then status, then IP status or whatever and get the phone's IP address. Write the ip address down. On your computer, open up a web browser and input the phone's IP address into the address bar and press enter. This should arrive you at the web gui for that phone. It'll probably ask you for login credentials; by default, the name is "Polycom" (yes , it is case-sensetive) and the password is 456. Once you are logged in, you should see several links like "General" "Network" "Sip" and "Lines". click on Lines. under "line 1", you will see the configuration for that line. simply duplicate the entries for lines 2, 3, and 4.