NETGEAR GS108LP User Manual

FAQs:
How do I troubleshoot problems with my NETGEAR PoE switch?
This article assists in troubleshooting common Power over Ethernet (PoE) problems with NETGEAR PoE
switches.
Power over Ethernet (PoE) is a networking feature defined by the IEEE 802.3af and IEEE 802.3at
standards. PoE lets Ethernet cables supply power to network devices over the existing data connection.
PoE-capable devices can be power-sourcing equipment (PSE), powered devices (PDs), or sometimes
both. The device that transmits power is a PSE, while the device that is powered is a PD. Here, the PSE is
a PoE switch. The PDs may be devices such as VoIP phones, wireless access points, and IP cameras.
For further information on PoE, refer to https://kb.netgear.com/209/What-is-PoE-Power-over-Ethernet
Follow the guidelines in this article to help resolve problems such as:
 PD is not powering on.
 PD is powering off intermittently.
 Certain PDs are powering on while other PDs on the same PoE switch remain powered off.
PoE Standards
As mentioned above, PoE is defined by IEEE 802.3af (known as PoE) and 802.3at (known as PoE+)
standards. If your PoE switch supports IEEE 802.3at, it can supply power to both 802.3at and 802.3af
PDs. However, if your switch supports 802.3af only, it can only supply power to 802.3af (PoE) PDs.
PoE Budget
Your PoE switch has a PoE budget, that is, the total amount of power measured in watts that it can
supply to PDs at one time. Refer to the datasheet of your switch to verify its PoE budget. You should
ensure that the amount of power being drawn by your connected PDs does not exceed the PoE budget
of your switch. When calculating the amount of power being drawn by your PDs, you need to check the
PoE class to which the PD belongs. The PoE class of a PD determines the amount of power it will require,
as seen in the below table:
Device
Class
Standard
Range of Power
Delivered to the
Powered Device
Minimum Output at PoE
Switch Port (Minimum
Allocated)
Maximum Output at PoE
Switch Port (Maximum
Allocated)
0
PoE/PoE+
0.44W-12.95W
15.4W
16.2W
1
PoE/PoE+
0.44W-3.84W
4.0W
4.2W
2
PoE/PoE+
3.84W-6.49W
7.0W
7.4W
3
PoE/PoE+
6.49W-12.95W
15.4W
16.2W
4
PoE+
12.95W-25.5W
30.0W
31.6W
If for example, you have 10 PDs that are class 2, the total budget required is 70W.

NETGEAR GS108LP Specifications

General

Switch type	Unmanaged
Quality of Service (QoS) support	Yes
Power connector	AC-in jack
Gigabit Ethernet (copper) ports quantity	8
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	-
Form factor	1U
Product color	Black, Grey
Number of fans	0 fan(s)
Total Power over Ethernet (PoE) budget	60 W
Power source	DC/PoE
Input current	1.25 A
DC input voltage	54 V
Power consumption (max)	130 W
Power consumption (typical)	67.5 W
MAC address table	4000 entries
Mean time between failures (MTBF)	2752476 h
10G support	No
Networking standards	IEEE 802.1p, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3at, IEEE 802.3az, IEEE 802.3i, IEEE 802.3u, IEEE 802.3x
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Heat dissipation	230.85 BTU/h
Operating altitude	0 - 1000 m
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	0 - 90 %
Harmonized System (HS) code	85176990

Weight and Dimensions

Depth	102 mm
Width	236 mm
Height	27 mm
Weight	600 g