FCD-IPM Installation and Operation Manual Chapter 5 Setup Menu
Interface Parameters Menu 5-31
Table 5-15. SHDSL Parameters (Cont.)
Parameters Possible Values Description
PSD
Symmetric
Asymmetric
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
0 dB 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
0 dB 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.
SHDSL Loops 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 Figure 5-33), type 2.
The SHDSL Loops menu appears (see Figure 5-35).
SHDSL LOOPS (Device name - FCD-IPM)
1. Local unit loop : [Disabled ]
Press the number to edit or ESC to return to the previous screen
Figure 5-35. SHDSL Loops Menu
Table 5-16. SHDSL Loops
Parameters Possible Values Description
Local unit loop Disabled
Local Loopback
Remote Loopback
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 Figure 5-36). The
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
(see Figure 5-37). SHDSL link remains operative, when the
remote loopback is running