Specifications

• 8 switch ports with 10/100 auto detect operation with status LED
• 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
• 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
• 3 power supply inputs
  • 2x 2.1mm power connectors, center positive
  • Mode A input with LED status
  • Mode B input with LED status
  • LED indicates 18/24 volt operation or 48/56 volt operation
  • Maximum input current per mode – 2.5 amps
  • Mode B PoE power input from the uplink port – 1.25 amps max
• 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
• Uplink port 10/100 mb
  • No PoE voltage out
  • Auto detect 568 A or 568 B connections
• 802.3af emulation ( always on, no autonegotiation)
  • 48 volt in either A or B modes
• Mikrotik, OpenMesh, Ubiquiti passive PoE
  • 24 volt in mode B

    Before pl ing 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. 
     
  • Not sure about the voltage and power – please see “Find A PoE” on our web page. If you see “802.3af” in the specs - then you need a 48 volt supply – available at our webpage
     
  • 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.
     
  • Many devices use 12v when powered by a wall transformer, and 48v when powered via Ethernet. The text looks like “12v, PoE” – this means 48v.
     

  • We offer 56, 48, 24, 18 and 12 volt power supplies – if you need a power supply, please call.

    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.  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.
    
    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

    Mode A shares power on the data 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.

    Power Supply Mode B,  Mixed operation

    Mode B uses the unused RJ45 pins 45 and 78.  All non-802.3af devices use Mode B.     Since non-802.3af 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 – 48 volt /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 if each of the power supplies are active.  This implements a failover solution.

     

    Load balancing – 802.3af only – each device can accept power from mode A or mode B – causing the load to be 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

    
    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.

    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 ZQ-POE-71 detects 568A and 568B cabling – so no crossover cables are required.
    
    Advanced Network configuration, VLANs etc

    
    The ZQ-POE-71 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.