8 Port Passive PoE Switch - WiFI

8 Port Passive PoE Switch - WiFI
8 Port Passive PoE Switch
Using your WS-POES-8-7 with 7 PoE ports
VOIP phones, cameras and WiFi AP’s need from 3 to 15 watts each, with this
switch, you can provide remote power up to 328 ft from the power source.
8 switch ports with 10/100 auto detect operation, with status LED
Auto detect 568A or 568B crossover cabling
Available power supply options
18 volts, 24 volts, 48 volts 56 volts
30 watts, 60 watts, 120 watts
100 to 240 volt AC input, 50 or 60 hz high efficiency
7 always on PoE outputs with either Mode A and/or Mode B
Mode A power and data on pins 12 (-) and 36 (+)
Mode B power or pins 45 (+) and 78 (-) with
data on pins 12 and 36
1 Uplink port 10/100 mb
No PoE voltage out, Mode B PoE in
Dual PTC fuses on each PoE output port
One 650 ma fuse per port for Mode A
One 1000 ma fuse per port for Mode B
18 volt to 56 volt operation – low power- under 3 watts
3 power supply inputs
2x 2.1mm x 5,5mm power connectors, center positive
Mode A input with LED status – 2.5 Amp Max
Mode B input with LED status – 2.5 Amp Max
Mode B PoE power input from the uplink port – 1.25 amps max
LED indicates 18/24 volt operation or 48/56 volt operation
Dual Power supply operation
Redundancy - 48v 802.3af only – see text
Load balancing – 48v 802.3af only – see text
Mixed voltage – Mode A at 48v and Mode B at 24v – see text
802.3af emulation ( always on, no autonegotiation)
48 volts - use either A or B Mode
Mikrotik, OpenMesh, Ubiquiti 24v passive PoE
24 volt - use mode B only
Low Power – excellent for Battery and Solar applications
PoE repeating is possible in Mode B – power this switch and attached
devices remotely using a WS-POE-1-WM
195mm x 82mm x 26mm W x H x D
URL: http://wifi-texas.com/
Before plugging in your devices – please check a few things.
Do you have a power supply? While in most cases, PoE is 48v,
some devices use 24 volts or 18 volts – for this reason, the power supply
is a separate order item.
802.3af? Then you need a 48 volt supply – available at our
webpage. Not sure about the voltage and power – please see “Find A
PoE” on our web page at http://wifi-texas.com .
12v, PoE ? Many devices use 12v when powered by a wall
transformer, and 48v when powered via Ethernet. If the text looks like
“12v, PoE” – this means 48v.
How many devices will you provide power to? Budget 6 watts for a
typical device – some are more, if the spec is not clear – then safe is to
plan for 15 watts per port. We offer power supplies that range from 7
watts to 120 watts.
Network installation - Connect the uplink port to your Router or
Ethernet switch. Connect the POE ports to your devices – it should power up and
connect – and you are all set. The WS-POES-8-7 detects 568A and 568B cabling
– so no crossover cables are required. Note below for Power Supply Options
We offer 56, 48, 24, 18 and 12 volt power supplies – if you
need a power supply, please call - If your device data sheet shows
“48v 350ma” please understand that this is not the power your device needs, but
the max power that is available according to the 802.3af spec. For example, a
Polycom VOIP phone is 802.3af compatible, but needs about 4 watts to operate.
Therefore, one 8 port switch and a 30 watt power supply can power 7 phones at
low cost.
Rack Mount adapter
2 switches to be placed in a 1U rack
space. 14 PoE ports and 2 uplink
ports. See WS-POES-1U
UL and FCC approved Power supplies
connect at the back in mode A or Mode B
PoE Tester shows actual voltage
available, current flowing and power
URL: http://wifi-texas.com/
Passive vs 802.3af - This switch is a passive injector and switch
combined. It does not do 802.3af autonegotiation – it does power 802.3af
devices, using a 48 volt power supply that is on all the time (an 802.3af switch
only applies voltage when the client device sends a command to the switch).
Especially for fixed installations where Cameras, WiFi-Access points and phones
are hard wired, this is an ideal solution.
Power Supply Mode A input - Mode A means power and data share
pins 12 36. Standard 802.3af client devices support power either with Mode A or
Mode B. But, sometimes only 2 of the 4 pairs of conductors in an Ethernet cable
are connected – Mode A allows operation in this condition. Note – it does not
matter if 568A and 568B or crossover cables are used. 802.3at devices can be
powered if both Mode A and Mode B inputs have 56 volts (10/100 speeds only).
Power Supply Mode B input - Mode B uses the unused RJ45
pins 45 and 78. All non-802.3af devices use Mode B, and 802.3at uses
both A and B. While any voltage up to 56v can be used, OpenMesh,
Mikrotik and UBNT devices generally use 24 volts.
Mixed operation - Since Mode B only devices do not accept power
on pins 12 36, in some cases (please test first!!) you can combine 48 volts
on mode A with 24 volts on Mode B for dual power supply operation.
OpenMesh for example is known to work this way.
Failover Mode A and B operation with 802.3af - Standard
802.3af client devices support power either with Mode A or Mode B. If
two power supplies with 48 volts are connected to this device, everything
will operate if either of the power supplies is working. The LEDs on the
front panel will indicate the status of each power supply. This implements
a failover solution if each supply can handle the full load. If the load is
more than one supply can handle, the total load can shared between
power supplies.
Devices with “12v, PoE” specifications - If the device
shows “12v, PoE” on the data sheet – this means that the device uses 12v
when powered from a transformer – and 48v when powered via Ethernet
cable. It will not work if 12 volts is applied as PoE.
IP Phones need 48 volts, Polycom and Cisco specials Aside from 6 very old Polycom phones, all IP Phones need 48v PoE.
Please do not try to power an IP phone with 24 volt PoE – it will not power
up. Older Cisco IP phones like the 7940 and 7960 need our crossover
cable model WS-CS-RJ45 – one for each phone.
Advanced Network configuration, VLANs etc - The WSPOES-8-7 can be configured for advanced settings with VLAN and other
features via an eeprom stored configuration on the RJ11 connector in
back. Contact tech support for more info on this.
URL: http://wifi-texas.com/
How PoE works
A device needs power to operate. Not volts or amps – power - expressed as
watts. That power can be supplied at different voltages. The electronics inside
the device needs usually about 3.3 or 5 volts. But at low voltages, the wires from
power supply have a lot of loss beyond about 6 feet. So for short distance power,
5v Cameras are shipped with a 5v power supply and work for about 6 feet. But if
you try to make a longer DC cord there is a lot of loss in the wire. With 24v or
48v on Ethernet – the loss is reduced by a factor of 25 or even 80.
PoE Injectors from WiFi-Texas
12 and 16 port rack mount
6 and 12 port gigabit
5v, 12 volt active splitters
1 port and 8 port devices and power supplies
5 volt and 12 volt products
To operate a USB device or a 5v camera via Ethernet, we offer the DC-DC convertor WSPOE-5v– it operates with a 24 volt power supply in mode B, for distances up to 328 ft.
To operate a 12v camera or router via Ethernet, we offer the DC-DC convertor WS-POE12v – it operates with a 24 volt power supply in mode B, for distances up to 328 ft.
WiFi-Texas.com Inc
815-A Brazos #326
Austin Texas, 78701
URL: http://wifi-texas.com/
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