A personalised configuration guide for Polycom Soundpoint IP 320, 321, 330, 331, 450, 550, 560, 650, 670 IP Phones with sipgate team is available at the following link:
Soundpoint IP 320, 321, 330, 331, 450, 550, 560, 650, 670
To test your configuration please see this Help Article:
Testing your VoIP Phone's Configuration
If you run into issues registering your phone online, with placing calls, or with audio quality the following Help Articles offer useful troubleshooting advice: