ZyXEL Communications P-2612HNU-F1 User Manual page 53

Select the Enable check box of SIP Service Provider and enter the SIP Service
4
Provider Name.
Go to the SIP Account screen, click the Edit icon of SIP 3.
5
Select the Active SIP Account check box, then enter the SIP Account Number,
6
Username, and Password. Leave other settings as default.
P-2612HNU-Fx User's Guide
Chapter 3 Tutorials
53