Unit Definitions
13
CopperLink 1101 Line Power PoE Extender User Manual
1
• General information
Unit Definitions
Local Customer Endpoint (LCE)
—Customer equipment that is typically closer to the centralized location.
This is often times a server or a network switch.
Remote Customer Endpoint (RCE)
—Customer equipment that is typically far away from other devices. It is
often a phone, camera, or other small device.
Local (L) Ethernet Extender
—The extender closer to the Local Customer Endpoint.
Remote (R) Ethernet Extender
—The extender closer to the Remote Customer Endpoint.
Data
Data may be transmitted full duplex at 10Mbit or 100Mbit. LCE and RCE must be able to be at the same data
rate.
Both the LCE and the RCE Ethernet ports should support at least 10Mbit full duplex, and be configured iden-
tically (see
Figure 2. Data path
Power
Power across the system as a whole must be defined before details about each unit can be understood.
The Local Customer Endpoint should not have power on the line in all cases. The Ethernet port on the Local
Ethernet Extender is not a PoE port. It is a 10/100 Ethernet port. If IEEE80.2af/at PoE is applied to it, the
power negotiation between the ports will fail.
Power-across-link application
The Local Customer Endpoint has no power on the Ethernet port.
The Local Ethernet Extender is powered using a PoE voltage external power source (approximately 54VDC).
This power supply's positive and negative leads are internally connected to data wires through some circuitry.
The chassis is not directly connected to the power supply so it is possible to use positive, negative, and isolated
voltage sources.
1
Power is sent to the Remote Ethernet Extender without any detection or negotiation. It is
completely passive.
When choosing to transmit non-isolated voltage, great care must be taken. There is no isolation in the system
besides the power supply.
If PoE power is applied to the Local Ethernet Extender’s
Ethernet port, equipment damage may occur.
CAUTION