Polycom Version 2.0.3B manual Reg.1.server.2.address=172.23.0.1

Technical Bulletin

SoundPoint ® IP, SIP 2.1

Phone Configuration

The phones at the customer site are configured as follows:

• Server 1 (the primary server) will be configured with the address of the

	service provider call server. The IP address of the server(s) to be used will
	be provided by the DNS server. For example:
	reg.1.server.1.address="voipserver.serviceprovider.com"
	• Server 2 (the fallback server) will be configured to the address of the
	router/gateway that provides the fallback telephony support and is
	on-site. For example:
	reg.1.server.2.address=172.23.0.1
Note
	It is possible to configure the phone for more than two servers per registration, but
	you need to exercise caution when doing this to ensure that the phone and network
	load generated by registration refresh of multiple registrations do not become
	excessive. This would be of particularly concern if a phone had multiple
	registrations with multiple servers per registration and it is expected that some of
	these servers will be unavailable.
	Phone Operation for Registration
	After the phone has booted up, it will register to all the servers that are
	configured.
	Server 1 is the primary server and supports greater SIP functionality than any
	of servers. For example, SUBSCRIBE/NOTIFY services (used for features such
	as shared lines, presence, and BLF) will only be established with Server 1.
	Upon registration timer expiry of each server registration, the phone will
	attempt to re-register. If this is unsuccessful, normal SIP re-registration
	behavior (typically at intervals of 30 to 60 seconds) will proceed and continue
	until the registration is successful (for example, when the Internet link is once
	again operational). While the primary server registration is unavailable, the
	next highest priority server in the list will serve as the working server. As soon
	as the primary server registration succeeds, it will return to being the working
	server.
Note
	If reg.x.server.y.register is set to 0, then phone will not register to that server.
	However, the INVITE will fail over to that server if all higher priority servers are
	down.

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