Filter
Top Products
LIP-6812 & LIP-6830 Installer Guide
Rev 01.04 91 June 07
4.13 QoS Configuration
Figure 4.13-1 QoS Configuration
On the QoS Configuration screen, the DiffServ Code Point (DSCP) and VLAN parameters are
defined. DSCP establishes the priority of the packet. Compatible routers apply the DSCP for
packet priority, handling higher priority packets first. However, at congested routers, higher
priority packets are discarded first. Thus, a median value for the DSPC is recommended.
The VLAN tag provides the definition for Ethernet frame priority and VLAN ID based on IEEE
802.1p/Q. The VLAN tag is assigned separately for the LIP-6812/LIP-6830 PC and LAN (voice)
port. When VLAN ID is assigned, only frames with the ID are accepted and frames sent by the
LIP-6812/LIP-6830 include the LAN port the VLAN information. In addition, the PC, LAN switch
ports and the default gateway must be assigned to employ the VLAN tags for proper operation.
Jitter Buffer Configuration is used to control QoS. The minimum, normal, and maximum delays
expected can be changed. Using larger values produce less packet loss as the LIP Phone will
wait longer for receipt of packets. However, large values may delay voice packet processing.
Smaller values may produce more packet loss but quicker voice packet processing.