Polycom SIP 3.0.2 ユーザーズマニュアル

 Configuration Files

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This configuration attribute is defined as follows:

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

nat.ip

dotted-decima

l IP address

Null

IP address to advertise within SIP signaling - should 

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 

 on page 

.

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.

These attributes are available on SoundPoint IP 600, 601, and 650 phones (with an 

attached Expansion Module) only.