VBrick Systems VB5000, VB6000, VB4000 manual Configuration Encoder Announce SAP

	MPEG-2 Configuration
Unicast Ping	Feature for primary destination can be enabled, disabled. If the
	VBrick is designated to transmit a transport stream to any
	destination (whether another VBrick or not) in unicast mode, this
	parameter is used to instruct the VBrick to ping the destination
	periodically to test connectivity before sending the stream. If
	Unicast Ping is not enabled, and the destination goes off-line, the
	unicast stream may be broadcast to all destinations causing flooding
	on the network. This scenario largely depends on network
	architecture and may or may not occur. This feature should only be
	disabled if the network has a particular requirement that makes it
	unworkable.
Join Own Multicast	Some network equipment requires that a multicast source (such as a
	VBrick encoder) join its own multicast group. This feature is
	enabled by default and has no adverse affect on equipment that is
	fully multicast compliant.

Configuration: Encoder > Announce (SAP)

Contains parameters used to change the SAP (Session Announcement Protocol) advertisements. SAPs are advertisement packets that are transmitted by VBrick appliances to other VBrick appliances and VBrick applications such as the Portal Server and StreamPlayerPlus. They are used to identify streams present in the network.

VBrick MPEG-2 Appliance Admin Guide 33