Polycom SIP 3.0.2 manual Permitted Attribute Values Default Interpretation

			Configuration Files
	Permitted
Attribute	Values	Default	Interpretation
voIpProt.SIP.connectionReuse.useAli	0, 1	0	If set to 0, this is the old behavior.
as			If set to 1, phone uses the connection reuse
			draft which introduces "alias".
voIpProt.SIP.sendCompactHdrs	0, 1	0	If set to 0, SIP header names generated by
			the phone use the long form, for example
			‘From’.
			If set to 1, SIP header names generated by
			the phone use the short form, for example ‘f’.
voIpProt.SIP.keepalive.sessionTimer	0, 1	0	If set to 1, the session timer will be enabled.
s			If set to 0, the session timer will be disabled,
			and the phone will not declare “timer” in
			“Support” header in INVITE. The phone will
			still respond to a re-INVITE or UPDATE. The
			phone will not try to re-INVITE or do UPDATE
			even if remote end point asks for it.
voIpProt.SIP.requestURI.E164.addGl	0, 1	0	If set to 1, ‘+’ global prefix is added to E.164
obalPrefix			user parts in sip: URIs:.
voIpProt.SIP.allowTransferOnProcee	0, 1	1	If set to 1, a transfer can be completed during
ding			the proceeding state of a consultation call.
			If set to 0, a transfer is not allowed during the
			proceeding state of a consultation call.
			If set to Null, the default value is used.
voIpProt.SIP.dialog.useSDP	0, 1	0	If set to 0, new dialog event package draft is
			used (no SDP in dialog body).
			If set to 1, for backwards compatibility, use
			this setting to send SDP in dialog body.
voIpProt.SIP.pingInterval	0 to 3600	0	The number in seconds to send "PING"
			message. This feature is disabled by default.
voIpProt.SIP.useContactInReferTo	0, 1	0	If set to 1, the Contact URI is used.
			If set to 0, the TO URI is used (previous
			behavior).
voIpProt.SIP.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.

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