Specifications
Installation and Operation Manual  Chapter  5 Monitoring and Diagnostics 
Optimux-34 Ver. 2.81  Detecting Errors  5-9 
³  To set the timeout for the Local Loopback: 
1.  Select Loop Timeout. 
2.  Enter the timeout value in minutes. The value you specify is the duration of 
the link loopback test. The maximum timeout duration value is 255 minutes. 
³  To perform E1 or V.35 loopbacks: 
1.  Select the Port Loops option to access the set up screen for the Loopback tests. 
The Port Loops screen is displayed. 
Diagnostics>Port Loops
 Number Loop Number Loop 
 1 E1 - 1 LLB E1 - 2 No loop 
 2 E1 - 3 No loop E1 - 4 No loop 
| 3 E1 - 5 No loop E1 - 6 No loop 
v 4 E1 - 7 No loop E1 - 8 No loop 
 5 E1 - 9 No loop E1 - 10 No loop 
 6 E1 - 11 No loop E1 - 12 No loop 
 1. No Loop 
 2. LLB 
 3. RLB 
> 
Please select item <1 to 3> 
ESC-prev.menu; !-main menu; &-exit 1 user(s) 
Figure 
5-12. E1/V.35 Loop Screen 
2.  Use the Tab key to select next changeable cell to highlight the Loop status 
field of the channel you want to change. 
3.  Enter the loopback status you want to set: 
<1> No Loop    No loopback on the channel 
<2> LLB    Local Loopback on the channel 
<3> RLB    Remote Loopback on the channel 
See 
Chapter 5
 for definitions of E1 and E3 link loopbacks. 
•   
Setting the E3 link local loopback in the local Optimux-34 disconnects the E3 link 
to the remote device. 
Port 16 can be set to either E1 or V.35. When the V.35 port is activated, loops for 
the V.35 port can only be set to port 16. 
Caution 
Note 










