Polycom SIP 2.2.2 manual Attendant attendant, VoIpProt.local.signalPort in sip.cfg

Configuration Files

This configuration attribute is defined as follows:

	Permitted
Attribute	Values	Default	Interpretation
nat.ip	dotted-decima	Null	IP address to advertise within SIP signaling - should
	l IP address		match the external IP address used by the NAT device.
nat.signalPort	1024 to 65535	Null	If non-Null, this port will be used by the phone for SIP
			signaling, overriding the value set for
			voIpProt.local.signalPort in sip.cfg.
nat.mediaPortStart	1024 to 65535	Null	If non-Null, this attribute will be used to set the initially
			allocated RTP port, overriding the value set for
			tcpIpApp.port.rtp.mediaPortRangeStart in sip.cfg.
			Refer to RTP <rtp/> on page A-54.
nat.keepalive.interval	0 to 3600	Null	If non-Null (or 0), the keepalive interval in seconds. This
			parameter is used to set the interval at which phones will
			send a keep-alive packet to the gateway/NAT device to
			keep the communication port open so that NAT can
			continue to function as setup initially.
			The Microsoft Live Communications Server 2005
			keepalive feature will override this interval. If you want to
			deploy phones behind a NAT and connect them to Live
			Communications Server, the keepalive interval received
			from the Live Communications Server must be short
			enough to keep the NAT port open. Once the TCP
			connection is closed, the phones stop sending keep-alive
			packets.

Attendant <attendant/>

Note	These attributes are available on SoundPoint IP 600 and 601 phones (with an
	attached Expansion Module) only.

The Busy Lamp Field (BLF) / attendant console feature enhances support for a phone-based attendant console.

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