respect to giving up IP addresses when the DHCP lease expires. If set to 0 (Yes) the phone
continues using the IP address until it detects reset or a conflict.
Quality of Service (QoS)
For more information about the extent to which your network can support any or all the QoS
initiatives, see your LAN equipment documentation.
IEEE 802.1D and 802.1Q
Three bits of the 802.1Q tag are reserved for identifying packet priority to set any one of the
following eight priorities to a specific packet.
• 7: Network management traffic
• 6: Voice for traffic with less than 10 ms latency and jitter
• 5: Video traffic with less than 100 ms latency and jitter
• 4: Controlled-load traffic for critical data applications
• 3: Traffic meriting extra-effort by the network for prompt delivery, for example, executive email
• 2: Reserved for future use
• 0: The default priority for traffic meriting the best-effort for prompt delivery of the network
• 1: Background traffic such as bulk data transfers and backups
Note:
Priority 0 is a higher priority than Priority 1.
Network audio quality
You can monitor network audio performance on the phone while on a call. You can view this
information on the Network Information screen. You can view the Network Information screen in
Main menu, and select the
Network Information
option directly if available. You can also select
Phone Settings
, then select the
Network Information
option.
While on a call, you can view the network audio quality parameters in real-time. See the following
table for the various parameters that you can view:
Table 2: Parameters in real-time
Parameter
Possible values
Received Audio Coding
G.711, G.722, G.726, or G.729.
Packet Loss
No call. The system counts late and out-of-sequence packets as lost if
the packets are discarded. The system does not count the packets as
lost until a subsequent packet is received and the loss confirmed by the
RTP sequence number.
Table continues…
Network requirements
May 2018
Installing and Administering Avaya J169/J179 IP Phone H.323
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