Paradyne 7511 technical manual Configuration Options 3 Switch Options and Usage

Table 1. Configuration Options (3 of 5)

Switch				Options and Usage		Default in Bold
64CC Data Scrambler				Determines whether the DSU scrambles data to minimize the possibility
	ON	ON
S1-6 (DSU A)				of the remote DSU falsely recognizing a loopback command.
			DSU A
S3-6 (DSU B)				Off	Disable
				Data scrambling is disabled.
	S1	S2
	S3	S4
	ON	ON		ON	Enable
			DSU B	Data scrambling is enabled.
V.54 Sequence				Determines whether the DSU responds to V.54 Loop Up and Loop
	ON	ON
Detection				Down sequences from the remote DSU.
S1-7 (DSU A)			DSU A	Off	Disable
S3-7 (DSU B)
				V.54 loop sequences are ignored.
	S1	S2
	S3	S4
	ON	ON		ON	Enable
			DSU B	The DSU responds to V.54 loop sequences.
Invert				Determines whether the DSU clock provided on interchange circuit
	ON	ON
TX Clock				CT114 (TXC) is phase-inverted with respect to interchange circuit
			DSU A	CT103 (TXD). This can reduce errors encountered due to excessive
S1-8 (DSU A)				cable lengths.
S3-8 (DSU B)
				Off	Normal
	S1	S2
	S3	S4		TXC is not inverted.
	ON	ON
			DSU B	ON	Invert

TXC is inverted with respect to TXD.

7511-A2-GN10-10 January 1999 5