Attendant Page 275
Page 275
Configuration Files
A - 121
This configuration attribute is defined as follows:
Attendant
The Busy Lamp Field (BLF) / attendant console feature enhances support for
a phone-based attendant console.
Attribute
Permitted
Values
Default
Interpretation
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.
Note
These attributes are available on SoundPoint IP 320/330, 430, 550, 560, 600, 601,
650, and 670 phones only.