RAD Data comm Modular Access Device with Integrated Router, E1/T1 operation manual Shdsl Loops

FCD-IPMInstallation and Operation ManualChapter 5 Setup Menu

Table 5-15. SHDSL Parameters (Cont.)

Parameters	Possible Values	Description
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
	Symmetric	Supported in both Annex A and Annex B modes
	Asymmetric	Supported in Annex A at 768 kbps and in Annex B at 2048 kbps
SNR Margin		Signal-to-noise margin (in dB)
SNR Margin	0 dB to 15 dB	Signal-to-noise ratio threshold. FCD-IPM sends trap, if the signal-
Threshold		to-noise ratio on the line exceeds the threshold value
Loop Attn.	0 dB to 127 dB	Loop attenuation is difference (in dB) between the power
Threshold		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		FCD-IPM operates normally, all loopbacks are disabled
	Local Loopback		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
	Remote Loopback		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

Interface Parameters Menu 5-31