RAD Data comm ASMi-52 Manuel D’Utilisation

Chapter 6  Troubleshooting and Diagnostics 

Installation and Operation Manual 

6-24 

Frequently Asked Questions

 

ASMi-52 Ver. 2.5 

 

To deactivate multiple loopbacks: 
•  From the Local or Remote Test menu, select Clear All. 

The TST indicator turns off. 

The user can perform the front-panel LED test to verify that the local unit 
indicators are functioning properly. 

 

To run the LEDs test: 
1.  From the Diagnostics menu (see 

), select Local Test (Main menu > 

Diagnostics > Local Test) to run the LEDs test on the local ASMi-52. 

The Local Test menu is displayed (see 

). 

2. Select LED Test. 

All the front-panel LED indicators light up for two seconds. 

: In which cases is it not possible to loop the ASMi-52 modem via the 

diagnostic screen? 
Answer

: There are two possible reasons why the loops options do not appear in 

the diagnostic screen: 
1.  The modem has an ETH interface, and since there are no loops in ETH, this 

option does not exist. 

2.  When two modems are connected back-to-back and one of them is in loop 

mode, the other modem cannot access the loop options. 

: What are the different types of SHDSL mapping supported by RAD 

products? 
Answer

: There are 3 modes of transferring user data over SHDSL: 

 

Serial ATM 

 

Slotted E1 

 

 n × 64 

Since SHDSL defines its own framing, the data must be "converted" to one of the 
three framing types defined above. Serial ATM uses ATM features (ATM cells, 
UVR, VBR, CBR, and so on); while slotted E1 defines timeslots as the timeslots 
used for E1 Tx (up to 2048 kbps). Finally, n × 64 defines the data rate of the serial 
port data in steps of 64 kbps, starting from 64 kbps, and ending in 4.6 Mbps.