Polycom DOC2230A manual Gateway, Radvision MGK-100 Radvision ECS, Cisco MCM PathNavigator

		Chapter 3 - Initial System Configuration
Table 3-11: H.323 Parameters (Continued)
	Field	Description
	Prefix (cont.)	You can define several Network Services on the
		MCU with each one of them containing one or
		several IP cards. When a firewall is used, two IP
		Network Services are usually defined; one for the
		card that is connected to the external network and
		the other one that includes all the remaining cards
		(those connected to the internal network).
	Refresh H.323	Enter the frequency in which the system informs the
	Registration Every	gatekeeper that it is active by re-sending the IP
	n Seconds	address and aliases of the IP cards to the
		gatekeeper. If the IP card does not register within the
		defined time interval, the gatekeeper will not refer
		calls to this IP card until it re-registers. If timeout is
		set to 0, re-registration is disabled.
		Note: It is recommended to use default settings.

The following table describes the gatekeeper modes that can be configured with each of the listed gatekeepers.

Table 3-12: Gatekeeper Interoperability

Gatekeeper Modes/		Basic	Board	Pseudo	Register as
Types			Hunting	Gatekeeper	Gateway
Radvision MGK-100		+	+	+	+
Radvision ECS		+	+	+	+
VCON MXM		+	+	+	+
Cisco MCM		-	-	-	+
PathNavigator		+	+	+	+
	Shading indicates the preferred configuration mode

12. Click Next.

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