RAD Data comm Modular Access Device with Integrated Router Manuel D’Utilisation

FCD-IPM Installation and Operation Manual 

Chapter 5  Setup Menu 

 

Interface Parameters Menu 

5-31 

PSD 

Power spectral density, amount of power applied to the 

spectrum of frequencies that carry the information signal in 
order to achieve a satisfactory level of signal strength at the 

receiving end of the circuit 
Supported in both Annex A and Annex B modes 
Supported in Annex A at 768 kbps and in Annex B at 2048 kbps 
 

SNR Margin 

Signal-to-noise margin (in dB) 

SNR Margin 

Threshold 

to 15 dB 

Signal-to-noise ratio threshold. FCD-IPM sends trap, if the signal-

to-noise ratio on the line exceeds the threshold value 

Loop Attn. 

Threshold 

 to 127 dB 

Loop attenuation is difference (in dB) between the power 

transmitted from FCD-IPM and the power received by the unit 
operating at the other side of the application. By setting the 

threshold, you instruct the FCD-IPM to generate a trap, if 

selected loop attenuation threshold value is exceeded. 

FCD-IPM supports activation of local and remote loopbacks. The loopbacks are 
activated via the SHDSL Loops menu. 

 

To access the SHDSL Loops menu: 
•  From the SHDSL Settings menu appears (see 

), type 2. 

The SHDSL Loops menu appears (see 

). 

SHDSL LOOPS  (Device name - FCD-IPM) 

 1.  Local unit loop      : [Disabled       ] 

Press the number to edit or ESC to return to the previous screen 

Local unit loop       Disabled 

 

FCD-IPM operates normally, all loopbacks are disabled 
In this mode, the data transmitted from FCD-IPM to the E1 

interface is sent back to the received path (see 

SHDSL link is down when the local loopback is active 
In this mode, FCD-IPM performs a loopback and transmits back 

the data that was received from the SHDSL line  

). SHDSL link remains operative, when the 

remote loopback is running