ADC Broadband System manual 158

ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

				DLP-541
				Page 6 of 16
		Table 541-1. Loopback Selection Field Options
FIELD	UNIT TYPE	LOOPBACK TYPE	OPTION	SHOWN IN…
DS3 MUX (HIGH SPEED)
Local	DS3 MUX	Network Loopback at the DS3 MUX	ACT NET	Figure 541-5
HDSL SYSTEMS (LOW SPEED)
Local	HLXC	Customer Loopback at the HLXC	ACT CUST	Figure 541-6a
		Network Loopback at the HLXC	ACT NET	Figure 541-6b
Local	HLXC	Send Loopback at the HLXC Module	SEND LPBK*	Figure 541-6c
Remote	HLXR	Customer Loopback at the HLXR	ACT CUST	Figure 541-7a
		Network Loopback at the HLXR	ACT NET	Figure 541-7b
HDSL SYSTEM WITH ONE HRX (LOW SPEED)
Repeater	HRX1	Customer Loopback at the HRX	ACT CUST	Figure 541-8a
		Network Loopback at the HRX	ACT NET	Figure 541-8b
HDSL SYSTEM WITH TWO HRXS (LOW SPEED)
Repeater 1	HRX1	Customer Loopback at the HRX1	ACT CUST	Figure 541-9a
		Network Loopback at the HRX1	ACT NET	Figure 541-9b
Repeater 2	HRX2	Customer Loopback at the HRX2	ACT CUST	not shown
		Network Loopback at the HRX2	ACT NET	not shown
FIBER OPTIC SYSTEM WITH ODS2 AND QLX MODULES (LOW SPEED)
Local	ODS2	Customer Loopback at the ODS2 Module	ACT CUST	Figure 541-10a
Remote	QLX	Network Loopback at the Remote QLX	ACT NET	Figure 541-10b
Local	ODS2	Send Loopback at the ODS2 Module	SEND LPBK*	Figure 541-10c
T1 SYSTEM WITH DLX MODULE (LOW SPEED)
Local	DLX	Customer Loopback at the DLX	ACT CUST	Figure 541-11a
		Network Loopback at the DLX	ACT NET	Figure 541-11b
Local	DLX	Send Loopback at the DLX Module	SEND LPBK*	Figure 541-11c
T1 SYSTEM WITH RLX MODULE (LOW SPEED)
Local	RLX	Customer Loopback at the RLX	ACT CUST	Figure 541-12a
		Network Loopback at the RLX	ACT NET	Figure 541-12b
Local	RLX	Send Loopback at the RLX Module	SEND LPBK*	Figure 541-12c

*The SEND LPBK option is only available in the Soneplex Broadband System at the Local command toggle field on the Loopback Status/Commands screen when the DS1 Loopback Mode field on the DS3 MUX Configuration screen is configured as C-Bit parity.

Note: When a customer (CPE) loopback is in progress, the network output signal is returned to the network as a keep-alive for network equipment. However, when a network loopback is in progress, an unframed all 1s signal (AIS) is transmitted to the customer interface.

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© 2000, ADC Telecommunications, Inc.