Multicast Paging Application - Grandstream Networks GSC3505 Series User Manual

By default, the GSC3510/GSC3505 Blocks non-whitelisted number under Calls
Rules, user needs to either allow Non-White list calls or to set up a Whitelist that contains the number that will be allowed to
call the GSC3510/GSC3505.
On the screenshot below, only number 1001 is allowed to call GSC3510/GSC3505:
As soon as a SIP call is received by the GSC3510/GSC3505, it first checks if the Caller ID number is allowed on the Whitelist
and then answers automatically.
Notes
GSC3510/GSC3505 is an intercom system and auto-answers all whitelisted numbers.
By default, GSC3510/GSC3505 plays a Warning tone when auto answering incoming calls, this warning tone can be disabled
under Account �� Account X

Multicast Paging Application

Multicast paging is an approach to let different SIP users to listen for paging calls from a common multicast IP address. In
multicast page call, an audio connection will be set up from sender to receiver, but the receiver will be only able to receive
audio, a one-way communication. The 2 entities, Sender/Receiver, must be located on same LAN (same broadcast domain).
Figure 17: SIP Account Status
Figure 18: Default Blocking Rules
Figure 19: Whitelisted Devices
�� Call Settings, "Play Warning Tone for Auto Answer Intercom".
�� Black/White List Settings �� Blocking