Polycom 3725-76302-001O manual Settings, See External Gatekeeper on

	Call Server Configuration
Field	Description
SIP max breadth	The maximum number of concurrent parallel branches due to forking of a
	request.
H.323 Settings
Gatekeeper call mode	Direct call mode — The Call Server processes only H.225.0 RAS call control
	messages. The endpoints exchange other call signaling and media control
	messages directly, bypassing the gatekeeper.
	Routed call mode — The Call Server proxies all H.323 signaling messages.
Accept H.323 neighbor requests	If this option is selected, the Call Server accepts H.323 location requests
only from specified external	(LRQs) only from gatekeepers configured on the External Gatekeeper page
gatekeepers	(see External Gatekeeper on page 101).
Resolve H.323 Email-ID dial	If this option is selected, the Call Server resolves email ID dial strings to
strings to other registered H.323	another local alias by using the user part of the email address. For example,
aliases	the dial string 1234@mycompany.com would resolve to the endpoint
	registered as 1234.
Automatically assign enterprise	If this option is selected and the system is integrated with Active Directory, an
users’ email addresses as H.323	endpoint associated with an enterprise user is assigned the user’s email
email IDs	address (if that address hasn’t already been explicitly assigned to another
	endpoint).
Location request hop count	The initial hop count the Call Server uses when it sends LRQs to neighbored
	gatekeepers.
Location request timeout	The number of seconds to wait for a response from a neighbored gatekeeper.
(seconds)
IRQ sending interval (seconds)	The interval at which the system sends IRQ messages to H.323 endpoints in
	a call, requesting QoS (quality of service) reports.
	Must be in the range 10-600.
Terminate calls based on failed	If this option is selected, the Call Server terminates a call if it sends an IRQ
responses to IRQs	(Information Request) to an endpoint that signaled support for IRQs, and the
	endpoint either fails to respond or responds with an IRR (Information Request
	Response) containing an invalidCall field. This is the correct behavior
	according to the H.323 ITU Specification, and it prevents a call license from
	being used unnecessarily for a call that’s no longer active.
	Some endpoints (VVX prior to v.4.0.1; Sony PCS1, XG80, and G70; and
	possibly others) signal support for IRQs but don’t properly handle IRQ/IRR
	messaging, causing active calls to be disconnected if this option is selected.
	To avoid this problem with such endpoints, leave this option off.
	Note: This setting has no effect on calls from endpoints that don’t signal
	support for IRQs.

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