I’ve used Soyo phones (they’re the worst all around), ip Dialog phones (they’re only a little better) and Grandstream’s GXP-2000.
As of firmware 126.96.36.199, the Grandstreams are a decent phone, easy and quick to configure, but they have a horrible echo in the speakerphone for the remote party.
Notes The Sound Point IP 501 is being discontinued and will no longer be available for purchase after 08/20/2009.
Support for the product will be available until 08/20/2014.
Finally, I’ve also noticed that, for some strange reason, the GMT offset for your time zone will not behave properly sometimes.
This is because the web configuration for the time server and GMT offset differs from what is loaded on the actual phone itself.
It REALLY goes in depth concerning all the files you’re dealing with and also how to provision.
Instead of setting these phones up by hand they should ALL be setup via files on the the FTP server.
Proceeding to the configuration: these instructions were made with Asterisk 1.0.9, Polycom Boot ROM 2.6.2 and SIP software version 1.5.2.
For starters, might as well get the extension configured in Asterisk.
In the instructions below, TFTP is only really used to push out the firmware updates.
About the Polycom 501 If you’re reading this to see how good certain phones are with Asterisk, let me tell you that the Polycom 501 has excellent features, but is a pain to configure and very tempermental.
When the web interface finally starts up 1-2 minutes after the phone is ready, it reloads that info instead.