Aastra Telecom 57I C53I manual Configuring the IP Phones

IP Phone Administrator Guide Advanced Network Settings

Configuring the IP Phones

Type of Service (ToS), Quality of Service (QoS), and DiffServ QoS

ToS is an octet as a field in the standard IP header. It is used to classify the traffic of the different QoSs.

QoS provides service differentiation between IP packets in the network. This service differentiation is noticeable during periods of network congestion (for example, in case of contention for resources) and results in different levels of network performance.

Port 0 is the Ethernet connected to the network. Port 1 is the Ethernet used for passthrough to a PC.

Differentiated Service (DiffServ) QoS is class-based where some classes of traffic receive preferential handling over other traffic classes.

The Differentiated Services Code Point (DSCP) value is stored in the first six bits of the ToS field. Each DSCP specifies a particular per-hop behavior that is applied to a packet.

The following parameters allow an administrator to configure ToS, QoS, and DiffServ QoS for VLAN:

•tagging enabled

•tos priority map

•priority non-ip

•VLAN id

•VLAN id port 1

•QoS eth port 1 priority

•tos sip

•tos rtp

•tos rtcp

4-32 41-001160-00, Rev 01 Release 2.0