User manual

Chapter 2 Installation
39
The FIB1-E1 and FIB1-T1 media converters incorporate Loop back testing
features that may be used with BER (Bit Error Rate) test equipment. Loop back is
enabled by the DIP switch#3&4 on the front panel. When installed in a manageable
rack, loop back testing is enabled via the console menu, Telnet menu, SNMP get/set
commands, or with the Windows® GUI software.
Figure 2-19 FIB1-E1 and FIB1-T1 loop back functions
DIP Setting Function Description
OFF HDB3 (BZ8S)
1
ON AMI
Line Code
OFF Disable
2
ON Enable
FEF
3 4 Loop Back Selection
OFF OFF Normal
ON OFF LLB - Local Loop Back
OFF ON RLB - Remote Loop Back
3
&
4
ON ON RRLB - Request Remote LB
Table 2-8 DIP setting table for FIB1-E1 and FIB1-T1
LLB
Local
loopback
Remote Side
Local Side
RLB
Remote
loopback
Remote Side
Local Side
RRLB
Request
Remote
loopback
Remote Side
Local Side