Took my Polycom Soundpoint IP 550 SIP phone from my office to connect at home. 1. Yellow cable from Polycom Soundpoint IP 550 SIP phone to PC no problem 2. Black LAN cable: a. There are two cables coming from the wall socket. A green cable that connects to a ?phone? socket in the back of At&t 3800HGV-B hub/modem (?)/(internet and U-verse TV). The grey cable connects to a ?phone 1 & 2? socket. The LAN cable will NOT fit into either wall socket. b. In the back of the At&t hub/modem (?) the LAN WILL fit into 2 available Ethernet sockets. There is a ?broadband? and ?aux? socket available but has tape covering the socket. c. If I plug LAN into any sockets in the At&t hub/modem (?) I get message ?COULD NOT FIND BOOT SERVER WITH EXISTING CONFIGURATION?. When the phone initializes I get flashing message ?Sunday, December 31, 4PM?. If I pick up phone the message is ?URL CALL DISABLED.? 3. Appears that At&t is not compatible with LAN, or I need another piece of equipment (router or?) to complete hook-up. Thank you ~ Gene

SOURCE: Making a Polycom SoundPoint 501 work on an Avaya IPO

As you have probably found, SIP phones are not supported until R5, which just came out.

SOURCE: what is the default password for Polycom

Default Passwords:
To get into the web interface, the default username/password is "Polycom"/"456" (Note that this does not work with Safari 1.2.2.)
To get into the Admin interface on the hard phone, the password is "456". (Prior to v1.3.1, the web interfaces to the phone uses "Polycom"/"SpIp" as the username/password.)
The "user password" (not used much) defaults to "123".

To reset a lost admin password to default: at phone boot, during the 5 second countdown, push/hold 468* on the phone. Enter the phone's MAC address as the password. This will reset network info but keep peers loaded. Tested on Soundpoint IP 650.

Testimonial: "Thanx a lot. Although I had managed to find the password for console but the web interface password was still missing. :-)"

SOURCE: Have a Polycom Soundpoint IP501 SIP phone. Some of

I would not recommend that. The keyboard circuit board is fragile to someone taking it apart for the first time.

SOURCE: Cisco IP Phone 7940 and 3com nbx as 3rd party SIP phones

Here are the instructions for configuring these units for 3cx

http://www.3cx.com/sip-phones/cisco-7940.html

http://www.3cx.com/sip-phones/polycom-soundpoint.html

Since the 3cx softphone worked well, I don't see why you couldn't configure each as for 3cx and make them work as well.

SOURCE: i am unable to push the configuration files into polycom soundpoint ip 330 through tftpd

This means the phone's SIP application has been erased. You will need to download the SIP app and BootROM from the Polycom support page, host the files on a boot server, and then point the phone to this server from the server menu so the phone will reboot and download the files.

http://www.polycom.com/support/voice/soundpoint_ip/soundpoint_ip330_320.html