User's Manual

1: Introduction
APCD-LM048-1.3 7
There is great latitude available in locating the EUM3006 and routing the Ethernet cable, since
up to 330 feet (100 m) of Ethernet cable can be used between the EUM3006 and the end-
user’s computer, router or Ethernet switch.
1.3.4 Power over Ethernet (PoE) Injector
Power is provided to EUM3006 Integrated Outdoor Modem through its Ethernet cable. This
power is provided by a device called a PoE Injector, which takes the Ethernet data-only
signals from the cable to the end-user’s computer, switch or router and adds the 48 VDC
power to the Ethernet cable going to the modem. The 48 VDC power is provided by converting
the AC power provided to the injector.
Figure 3 PoE Injector
Using the standard 48 VDC means that the PoE Injector can be located at any point between
the end-user and the EUM3006, without worrying about excessive voltage drop.
The supplied PoE injector is rated for indoor conditions.
The supplied PoE Injector need not be used if 48 VDC 802.3af Mode B PoE power is being
provided by a router or Ethernet switch. It is beyond the scope of this document to discuss
configuring such devices. It is the installer’s responsibility to ensure that such devices are
compatible with the EUM3006.
WARNING!
Plug the EUM3006 directly into routers or Ethernet switches
ONLY if these are providing compatible 48 VDC 802.3af Mode
B PoE power, in lieu of the supplied PoE Injector.
1.3.5 PoE Lightning Arrestor
A PoE lightning arrestor (not supplied) is used with the EUM3006 if it is required by the
national building codes and/or the EUM3006 is being installed in an area subject to direct or