Polycom SIP 3.1 manual NOTE TLS is not supported on SoundPoint, IP 300 and 500 phones

Administrator’s Guide SoundPoint IP / SoundStation IP

	Permitted
Attribute	Values	Default	Interpretation
reg.x.outboundProxy.transport	DNSnaptr or	DNSnap	If set to Null or DNSnaptr:
	TCPpreferred or	tr	If reg.x.outboundProxy.address is a
	UDPOnly or		hostname and reg.x.outboundProxy.port is 0
	TLS or		or Null, do NAPTR then SRV look-ups to try
	TCPOnly		to discover the transport, ports and servers,
			as per RFC 3263. If
			reg.x.outboundProxy.address is an IP
			address, or a port is given, then UDP is used.
			If set to TCPpreferred:
			TCP is the preferred transport, UDP is used if
			TCP fails.
			If set to UDPOnly:
			Only UDP will be used.
			If set to TLS:
			If TLS fails, transport fails. Leave port field
			empty (will default to 5061) or set to 5061.
			If set to TCPOnly:
			Only TCP will be used.
			NOTE: TLS is not supported on SoundPoint
			IP 300 and 500 phones.
reg.x.proxyRequire	string	Null	The string that needs to appear in the
			“Proxy-Require” header. If Null, no
			"Proxy-Require" will be sent.
reg.x.serverFeatureControl.cf	0, 1	0	If set to 1, server-based call forwarding is
			enabled. The call server has control of call
			forwarding.
			If set to 0, server-based call forwarding is not
			enabled. This is the old behavior.
			If reg.x.serverFeatureControl.cf is not
			Null, this attribute overrides the global
			server-based call forwarding flag in the
			sip.cfg configuration file.
reg.x.serverFeatureControl.dnd	0, 1	0	If set to 1, server-based DND is enabled. The
			call server has control of DND.
			If set to 0, server-based DND is not enabled.
			This is the old behavior.
			If reg.x.serverFeatureControl.dnd is not
			Null, this attribute overrides the global
			server-based call forwarding flag in the
			sip.cfg configuration file.

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