Polycom SIP 2.2.2 manual Refer to Call Handling Configuration call

			Configuration Files
	Permitted
Attribute	Values	Default	Interpretation
reg.x.ringType	1 to 22	2	The ringer to be used for calls received by
			this registration. Default is the first non-silent
			ringer.
reg.x.lineKeys	1 to max	1	max = the number of line keys on the phone.
			max = 1 on SoundStation IP 4000,
			max = 2 on IP 301, 320, 330, 430,
			max = 3 on IP 501,
			max = 4 on IP 550,
			max = 6 on IP 600,
			max = 48 on IP 601, 650 (without any
			Expansion Modules attached, only 6 line keys
			are available)
			The number of line keys on the phone to be
			associated with registration ‘x’.
reg.x.callsPerLineKey	1 to 24 OR	24 OR	For the SoundPoint IP 600, 601, and 650 the
	1 to 8	8	permitted range is 1 to 24 and the default is
			24.
			For all other phones the permitted range is 1
			to 8 and the default is 8.
			This is the number of calls or conferences
			which may be active or on hold per line key
			associated with this registration.
			Note that this overrides
			call.callsPerLineKey for this registration.
			Refer to Call Handling Configuration <call/>
			on page A-55.
reg.x.outboundProxy.address	dotted-decimal IP	Null	IP address or host name and port of a SIP
	address or host		server to which the phone shall send all
	name		requests.
reg.x.outboundProxy.port	1 to 65535	5060

A - 85