Atc+Wmm - ZyXEL Communications NWA-3160 - V3.70 Manual

typical data packet sizes. Note that the figures given are merely examples - sizes
may differ according to application and circumstances.
Table 32 Typical Packet Sizes
APPLICATION
Voice over IP (SIP)
Online Gaming
Web browsing (http)
FTP
When ATC is activated, the device sends traffic with smaller packets before traffic
with larger packets if the network is congested.
ATC assigns priority to packets as shown in the following table.
Table 33 Automatic Traffic Classifier Priorities
PACKET SIZE
(BYTES)
1 ~ 250
250 ~ 1100
1100 +
You should activate ATC on the NWA if your wireless network includes networking
devices that do not support WMM QoS, or if you want to prioritize traffic but do not
want to configure WMM QoS settings.

9.3.3 ATC+WMM

The NWA can use a mapping mechanism to use both ATC and WMM QoS. The
ATC+WMM function prioritizes all packets transmitted onto the wireless network
using WMM QoS, and prioritizes all packets transmitted onto the wired network
using ATC. See
ATC+WMM.
Use the ATC+WMM function if you want to do the following:
• enable WMM QoS on your wireless network and automatically assign a WMM
priority to packets that do not already have one (see
156).
• automatically prioritize all packets going from your wireless network to the
wired network (see
NWA-3160 Series User's Guide
TIME
SENSITIVITY
High
High
Medium
Low
ATC PRIORITY
ATC_High
ATC_Medium
ATC_Low
Section 9.2.1 on page 152
Section 9.3.3.2 on page
TYPICAL PACKET
SIZE (BYTES)
< 250
60 ~ 90
300 ~ 600
1500
for details of how to configure
Section 9.3.3.1 on page
156).
Chapter 9 SSID Screen
155