Polycom 1725-11530-310 사용자 설명서

Administrator’s Guide SoundPoint IP / SoundStation IP 

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systems. This feature uses noise synthesis techniques to smooth out the noise 

level in the direction toward the remote user, providing a more natural call 

experience.
There are no related configuration changes.

Automatic Gain Control (AGC) is applicable to hands-free operation and is 

used to boost the transmit gain of the local talker in certain circumstances. This 

increases the effective user-phone radius and helps with the intelligibility of 

soft-talkers.
There are no related configuration changes.

The “type of service” field in an IP packet header consists of four 

type-of-service (TOS) bits and a 3-bit precedence field. Each TOS bit can be set 

to either 0 or 1. The precedence field can be set to a value from 0 through 7. The 

type of service can be configured specifically for RTP packets and call control 

packets, such as SIP signaling packets.
Configuration changes can performed centrally at the boot server or locally:

The phone will tag all Ethernet packets it transmits with an 802.1Q VLAN 

header for one of the following reasons:

• When it has a valid VLAN ID set in its network configuration

• When it is instructed to tag packets through Cisco Discovery Protocol 

(CDP) running on a connected Ethernet switch

• When a VLAN ID is obtained from DHCP (refer to 

)

The 802.1p/Q user_priority field can be set to a value from 0 to 7. The 

user_priority can be configured specifically for RTP packets and call control 

packets, such as SIP signaling packets, with default settings configurable for 

all other packets. 

Configuration file: 
sip.cfg

Specify protocol-specific IP TOS settings.

For more information, refer to 

 on page 

Web Server

(if enabled)

Specify IP TOS settings. 

Navigate to: http://<phoneIPAddress>/netConf.htm#qo