Automatic gain control, Ip type-of-service, Ieee 802.1p/q – Polycom SOUNDPOINT SIP 3.1 User Manual
Page 132
Administrator’s Guide SoundPoint IP / SoundStation IP
4 - 78
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
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.
IP Type-of-Service
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:
IEEE 802.1p/Q
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
on page
)
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.
Central
(boot server)
Configuration file:
sip.cfg
Specify protocol-specific IP TOS settings.
•
For more information, refer to
Local
Web Server
(if enabled)
Specify IP TOS settings.
Navigate to: http://<phoneIPAddress>/netConf.htm#qo