COMMON QUESTIONS FOR INSTALLING THE ENABLE-IT 821 ETHERNET LAN EXTENDER.
The 821 Ethernet LAN Extender kit works fine in the lab for the out of the box test, but when I placed them in the field No GREEN Sync LED Light
The issue clearly is the wiring between the 821 CO and CPE unit. Check your cabling and INTERLINK port connections and if you may have bent any pins in the RJ-45 connections on either 821 unit.
We highly recommend a quick test to ensure the working order of you 821 units.
To do this, Attach the 12V DC power adapter to each 821 unit and power up the units. The Power LED will indicate the unit is receiving power.
Connect the 821 units together using one of the Ethernet LAN Patch cords provided – attach to the RJ-45 Interlink port on each 821 unit.
LED indicators will provide visual operational status of the 821 units.
GREEN Sync – Indicates link established with CPE / Slave unit .
CO LAN Act – Indicates local LAN is visible and connected with activity.
CO Power – should be lit when 5v adapter is connected and powered
This confirms proper operation of the units.
For installation at your desired location, keep in mind the following:
The backbone cable between the CO & CPE – RJ-45 LINE ports uses –
2-pair of wiring for data and voice use only (RJ-45 pins 1,2,3 & 6) or 4-pairs of wiring for data, voice and PoE (All RJ-45 pins)
Two RJ-45 blank male heads have been provided in the kit for use in connecting your wiring to the 821 LINE ports. The RJ-45 Pins are straight through just like an Ethernet patch cord.
DO NOT INSERT THE BLANK RJ-45 HEADS PROVIDED INTO ANY PORTS BEFORE CRIMPING
– OTHERWISE YOU WILL RENDER THE PORT USELESS – BENT PINS
Will the 821 work with any manufacturer’s wireless AP?
Yes, if using a IEEE 802.3af standard PoE injector or PoE midspan switch. Cisco PoE switches do not work as they do not startup in a 802.3af mode by default and can’t configure itself for Long Reach Ethernet.
We recommend using a standalone PoE Injector when in doubt.
IEEE 802.3af standard passes power over Ethernet on pins 4,5,7 & 8. Using a straight through CAT5e cable for PoE – Pins 1,2,3, and 6 carry the data while pins 4,5,7, and 8 carry power PoE injectors can come in(24,48 and 56V) variations. PoE equipment on the other hand can be any voltage up to 56V. Each PoE Equipment mfg. has a built in regulator that takes whatever voltage coming out of a PoE/Data cable and conditions it down to what it needs.
Voltage drops over distance using wires. At 200M, you lose maybe 4 or 6 volts. At 48VDC, that leaves you with 42 volts. You can determine the amount of voltage drop over a distance by finding the resistance of the cable for a specific temperature (given in ohms/1000ft) from the cable manufacturer or electrical wholesaler. If you know the largest amount of current that will flow in the cable, when use the formula: Vdrop = Current X Distance (Ft) X 2 X Ohms per 1000Ft.
As a rule of thumb you will loose 6V per every 100? – 200? of wiring, depending on the gauge. Lower power also means more amperage means more heat and perhaps issues with the 24 gauge wires in CAT5. You may need to use 18 gauge wiring. For all intensive purposes anything greater than 400? use a 48V POE.