Polycom SIP 2.2.0 manual Network Address Translation nat

Administrator’s Guide SoundPoint IP / SoundStation IP

Message Waiting Indicator <mwi/>

In the following table, x is the registration number. IP 301, 320, 330, 430: x=1-2;

IP 501: x=1-3; IP 550: x=1-4; IP 600: x=1-6; IP 601: x=1-12;

IP 650: x=1-34; IP 4000: x=1.

This configuration attribute is defined as follows:

Attribute	Permitted Values	Default	Interpretation
msg.mwi.x.subscribe	ASCII encoded string containing	Null	If non-Null, the phone will send
	digits (the user part of a SIP		a SUBSCRIBE request to this
	URL) or a string that constitutes		contact after boot-up.
	a valid SIP URL (6416 or
	6416@polycom.com)
msg.mwi.x.callBackMo	contact or	“registration”	Configures message retrieval
de	registration or		and notification for the line.
	disabled		If set to “contact”, a call will be
			placed to the contact specified
			in the callback attribute when
			the user invokes message
			retrieval.
			If set to “registration”, a call will
			be placed using this registration
			to the contact registered (the
			phone will call itself).
			If set to “disabled”, message
			retrieval and message
			notification are disabled.
msg.mwi.x.callBack	ASCII encoded string containing	Null	Contact to call when retrieving
	digits (the user part of a SIP		messages for this registration.
	URL) or a string that constitutes
	a valid SIP URL (6416 or
	6416@polycom.com)

Network Address Translation <nat/>

These parameters define port and IP address changes used in NAT traversal. The port changes will change the port used by the phone, while the IP entry simply changes the IP advertised in the SIP signaling. This allows the use of simple NAT devices that can redirect traffic, but do not allow for port mapping. For example, port 5432 on the NAT device can be sent to port 5432 on an internal device, but not port 1234.

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