Paradyne 7511 technical manual Configuration Options 5 Switch Options and Usage

Table 1. Configuration Options (5 of 5)

Switch				Options and Usage		Default in Bold
DSR				Determines the operation of interchange circuit CT107, Data Set Ready
	ON	ON
S2-5 (DSU A)				(DSR).
			DSU A
S4-5 (DSU B)
				Off	Standard

DSR is always on, except when an alarm is detected or a test is active.

S1	S2
S3	S4
ON	ON	ON	Forced On

DSR is forced on after a successful self-test.

DSU B

511 Test	ON		ON				Determines whether the DSU will generate and monitor a 511 test
Pattern							pattern in remote loopback tests.
Generation						DSU A
and							Off	Enable
Monitoring
							A 511 pattern is generated and monitored during the remote loopback
S2-6 (DSU A)	S1			S2			test.
	S3			S4
S4-6 (DSU B)
	ON		ON
							ON	Disable
						DSU B	A 511 pattern is not generated. External test equipment is required to
							perform a Bit Error Rate test.
CT141							Determines whether a local digital loopback can be controlled by the
		ON
	S5				DSU A		DTE using interchange circuit CT141, Local Loopback (LL). If enabled,
S5-1 (DSU A)					DSU B		the DTE port remains in loopback while LL is on.
S5-3 (DSU B)							Off	Disable
							The DSU will not initiate the loopback on command from the DTE.
							ON	Enable
							The DSU initiates the loopback.
CT140							Determines whether a remote digital loopback can be controlled by the
		ON
S5-2 (DSU A)	S5				DSU A		DTE using interchange circuit CT140, Remote Loopback (RL). If
					DSU B		enabled, the remote DSU must be able to detect the in-band V.54
S5-4 (DSU B)							loopback sequence.
							Off	Disable
							The DSU will not initiate the loopback on command from the DTE.

ON Enable

The DSU initiates the loopback.

7511-A2-GN10-10 January 1999 7