Polycom DOC2231A manual Sip

	Chapter 3 - MGC+ Software Installation and Configuration
Table 3-1: IP Configuration Parameters (Continued)
Field	Description
Prefix	Enter a number to be used by H.323 participants to dial
	to the MCU as part of the dial-in string.
	Enter 789 to use the default Entry Queues and Meeting
	Rooms shipped with the MGC+ unit without modifying
	their properties.
	When PathNavigator is used, this prefix automatically
	registers with the gatekeeper. When another
	gatekeeper is used, this prefix must also be defined in
	the gatekeeper.
SIP	Select this check box to indicate that SIP participants
	can connect to the MCU using this service. Then select:
	• Specify - to manually define the SIP server.
	• Auto - to automatically detect the SIP server’s IP
	address if a DHCP or if a DNS Server is defined.
SIP Server IP	If SIP-Specify is selected, and a DHCP is not used,
Address or	enter either the IP address of the preferred SIP server
Name	or its host name (if a DNS server is used).
Domain Name	Conferences and Entry Queues can be registered in the
or IP Address	proxy in the format user@host. for example,
	EQ1@polycom.com, where EQ1is the user part and
	polycom.com is the host part.
	When dialing to a conference or Entry Queue, the SIP
	server expects to receive the host either as domain
	name or as an IP address.
	The domain name is used for identifying the SIP server
	in the appropriate domain according to the host part in
	the dialed string. For example, when the call to
	EQ1@polycom.com reaches the outbound proxy, this
	proxy looks for the SIP server in the polycom.com
	domain to which it will forward the call.
	When this call arrives at the SIP server in polycom.com,
	the server looks for the registered user (EQ1) and
	forwards the call to this Entry Queue or conference.

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