Paradyne 7511 technical manual Configuration Options 2 Switch Options and Usage

Table 1. Configuration Options (2 of 5)

Switch

Options and Usage Default in Bold

TX Timing Source	ON	ON		The timing source for the DSU.
S1-2 & S1-3 (DSU A)			DSU A	Off Off DDS
S3-2 & S3-3 (DSU B)

For DDS, both switches must be Off.

S1	S2
S3	S4		For LADS:
ON	ON
			Off ON	Receive
		DSU B	Receive means timing is derived from the line receive signal.
			ON Off	Internal

Internal means timing is provided by the unit's internal clock.

				ON ON	External
				External means timing is provided by the DTE.
Ten-Minute Test				Determines whether user-initiated tests automatically terminate after
	ON	ON
Abort Timer				10 minutes.
S1-4 (DSU A)			DSU A	Off	Enable
S3-4 (DSU B)
				Tests terminate automatically after 10 minutes.
	S1	S2
	S3	S4
	ON	ON		ON	Disable
			DSU B	Tests run indefinitely.
Network-Initiated				Determines whether the DSU responds to DSU latching loopback start
	ON	ON
DSU Loopback				and stop sequences sent by the network. This option is applicable only
			DSU A	if the DDS line rate is 64 kbps clear channel.
S1-5 (DSU A)
S3-5 (DSU B)				Off	Enable
	S1	S2		The DSU responds to loopback sequences.
	S3	S4
	ON	ON
				ON	Disable
			DSU B	The DSU ignores loopback sequences.

4 January 1999 7511-A2-GN10-10