Alcatel-Lucent MDR-8000 User Manual page 29

System Loopback
6.11.3
See Figure 6 - 18 for the system loopback functions. There are three system loopback
functions available on the Ethernet radio; Eth facility loopback, RC3 equipment loop-
back, and Eth equipment loopback. All loopbacks occur on the Ethernet I/O interface
module. The loopback functions are controlled by software via the SYSTEM LOOP-
BACK controls on the USI Control screen.
6.11.3.1 Eth Facility Loopback
Eth facility loopback is a local loopback function that can be used to test the perfor-
mance of a standalone radio. Eth Facility loopback is enabled by selecting A Eth Facil-
ity under SYSTEM LOOPBACK on the USI Control screen. This function loops the
Ethernet RCV/ radio XMT (EthR/RT) input back into the Ethernet XMT /radio RCV
(EthT/RR) output. The actual loopback occurs in the PHY circuits on the I/O interface.
When enabled, the Eth R/RT input is switched through the MUX to the EthT/RR out-
put. The Eth/R/RT input also continues through the MUX to the ETHRA FPGA .
ELMC Address: 201R2
IN-SERVICE
A Transmitter On Line
B Transmitter On Line
A Receiver On Line
B Receiver On Line
A Ethernet In Active
B Ethernet In Active
A Ethernet Out Active
B Ethernet Out Active
A Ethernet Online
B Ethernet Online
A DS1 Online
B DS1 Online
Figure 6 - 17 Ethernet Radio, Ethernet Control Screen
LOCAL CONTROLS (RS-232)
Communicating**
IN-SERVICE
Control #1
Control #2
Control #3
Control #4
Control #5
Control #6
SYSTEM LOOP-BACK
A Ethernet Facility B Ethernet Facility
A Radio Equipment B Radio Equipment
A Ethernet Equipment B Ethernet Equipment
DS1 LINE LOOP-BACK RCV to XMT
Line 1 Facility Line 1 Equipment
Line 2 Facility Line 2 Equipment
Line 3 Facility Line 3 Equipment
Line 4 Facility Line 4 Equipment
MDR-1204
08/08/05
6 - 19