Grandstream Networks HT503 - Manual (Page 9)

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Figure 2-2: SIP Configuration of Surveillance Products
Figure 2-3: SIP Configuration of Surveillance Products
The “Phone List” is the place to fill real phone number if the Surveillance products have the related SIP server
and registered. In this application, there is NO SIP server and only IP Peer Call solution, therefore any digits
should be fine here as space taker to make it work.