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C
HAPTER
1
| Introduction
Overview
– 18 –
P
O
E F
EATURES
The SMCGS1601P can provide up to 30 Watts of power to attached devices, such
as VoIP phones, wireless access points, surveillance cameras, etc, all over
existing Cat. 5 cables. The switch can deliver up to 30 Watts on 8 ports, or 15.4
Watts on 16 ports. This eliminates the need for individual power sources for
devices in the network, saving on costs for power cables and avoiding power
outlet availability issues.
IEEE 802.1
P
Q
O
S
The SMCGS1601P switch supports 802.1p priority queuing Quality of Service,
which is an implementation of the IEEE 802.1p standard. With the 802.1p QoS
function, network traffic that requires high priority, such as VoIP (Voice-over
Internet Protocol), web browsing applications or video conferencing, can be
forwarded before other traffic. The switch has separate hardware queues for
each physical port, when packets are received with an 802.1p priority tag, they
are sent to the appropriate output queue.
The illustration below shows how 802.1p priority queuing is implemented on the
switches.
Figure 1: Mapping QoS on the Switch
There are four priority levels labeled TC0, TC1, TC2 and TC3. The untagged
packets and the eight IEEE 802.1p priority tags (defined by the standard) are
mapped to the four priority queues on the switch. TC3 has the highest priority of
the four priority queues while TC0 has the lowest priority. The untagged packets
and eight priority tags, specified in IEEE 802.1p, are mapped to the switch’s
priority tags as follows:
◆
Untagged packets, and packets with priority tag 1 and 2 are assigned to the
switch’s TC0 level queue.
◆
Packets with priority tag 0 and 3 are assigned to the switch’s TC1 level
queue.
◆
Packets with priority tag 4 and 5 are assigned to the switch’s TC2 level
queue.
Tag
untag
0
1
2
3
4
5
6
7
Priority Level
Weight Value
1
2
4
8
TC0
TC1
TC2
TC3
Summary of Contents for EZ Switch SMCGS1601P
Page 1: ...USER GUIDE EZ SwitchTM 10 100 1000 16 Port Unmanaged Gigabit Ethernet PoE Switch SMCGS1601P...
Page 12: ...COMPLIANCES AND SAFETY STATEMENTS 12...
Page 14: ...ABOUT THIS GUIDE 14...
Page 20: ...CHAPTER 1 Introduction Overview 20...
Page 30: ...CHAPTER 3 Installing the Switch Connecting Network Devices 30...
Page 38: ...APPENDIX B Specifications Physical Characteristics 38...
Page 39: ......