Ip Type-Of-Service; Ieee 802.1P/Q - Polycom CX5500 Administrator's Manual

Polycom CX5500 Unified Conference Station Administrator's Guide
Note: Network Bandwidth Requirements for Encoded Voice
The network bandwidth necessary to send the encoded voice is typically 5–10% higher than the
encoded bit rate due to packetization overhead. For example, a G.722.1C call at 48 kbps for both
the receive and transmit signals consumes about 100 kbps of network bandwidth (two-way audio).
Use parameters in the table
Audio Codec Priorities
Central Provisioning Server
To specify the priority for a codec
Web Configuration Utility
To enable or disable codecs and specify codec priority, navigate to Settings > Codec Profiles and expand the
Audio Priority menu.

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. See the table
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.
IP Type-of-Service (ToS)
Central Provisioning Server
Set the IP header bits for call control
Set the IP header bits for RTP
Set the IP header bits for RTP video
Web Configuration Utility
Set the QoS IP settings by navigating to Settings > Network > QoS.

IEEE 802.1p/Q

The phone will tag all Ethernet packets it transmits with an 802.1Q VLAN header when:
A valid VLAN ID specified in the phone's network configuration.
●
●
The phone is instructed to tag packets through Cisco Discovery Protocol (CDP) running on a
connected Ethernet switch.
●
A VLAN ID is obtained from DHCP or LLDP (see DHCP Menu).
Polycom, Inc.
Audio Codec Priorities to specify the priority for audio codecs.
IP Type-of-Service (ToS)
template > parameter
site.cfg > voice.codecPref.<nameOfCodec>
for available parameters. Each TOS bit can be
template >
site.cfg > qos.ip.callControl.*
site.cfg > qos.ip.rtp.*
site.cfg > qos.ip.rtp.video.*
1.1.0
parameter
172