Proxim Tsunami Multipoint MP-820-BSU-100 Installation Manual page 45

A detailed description about the various components of the device are explained in the following sections.
3.1.1.1 Gigabit Ethernet Ports
The device comes with two auto-sensing 10/100/1000 BASE-T Ethernet ports with configurable Tx modes and speeds.
3.1.1.1.1 a) Ethernet Port 1
The Gigabit Ethernet port 1 (PoE IN and Data) of the device allows the user to connect to the LAN by using Cat5e/Cat6
Ethernet cable, and also power ON the device by using the Power over Ethernet (PoE) Injector supplied with the product
package.
The device receives 48 VDC via a a standard Cat5e/Cat6 cable connected between the PoE and the device.
Maximum power supplied to the device is 32 Watts and the device typically draws 6 Watts.
Above 0° Celsius internal temperature, the device need not regulate its temperature, so the power drawn is generally lower in
this temperature range. When the internal temperature gets close to the limits, the device starts to heat itself and the power
draw increases. Powering the device when it is cold, triggers a special self-heat mode where the device is inoperable until the
internal temperature is above -20° Celsius. This is signaled by a solid yellow LED on the Ethernet connector. Once the internal
temperature is above -20° Celsius, the device boots normally.
Type
Impedance
Cable Length 330 feet / 100 meters
: Always use a straight cable from PoE to the device. When you use a 4-pair cross over ethernet cable, the reload
functionality gets activated and forcibly deletes the operating image.
®
Tsunami 800 and 8000 Series - Hardware Installation Guide
Figure 3-2 MP-8150-SUR / QB-8150-EPR / QB-8151-EPR
Recommended Ethernet Cable Specifications
Cat5e/Cat6, STP, 24 AWG, UL rated, UV-shielded and outdoor-rated
100 ohms
: The total length of cabling between the Personal Computer and the device
cannot exceed 100 meters (includes cable from the Personal Computer to the
PoE, and the cable from the PoE to the device). Due to DC power requirements,
the maximum cable length between the PoE Injector and the device is 75
meters.
8000 Series - Hardware Overview and Installation
45