Metaswitch SIP registration URL
SIP phones registering URL:
Standard: https://userportal.appiaservices.com/sip-ps
Bootstrap (Panasonic): https://userportal.appiaservices.com/bootstrap
Cisco SPA (phones and ATAs): https://cisco.userportal.appiaservices.com/sip-ps/$MA.cfg
Legacy Yealink Phones (T26p & W52p): tftp://yealink-legacy.appiaservices.com
Supported phones: https://www.uc.solutions/Metaswitch/Troubleshooting/Supported_Devices