Black Box ME758C-RJ45 S2 Position 3 V.52 and V.54 Diagnostic Testing, S2-6 Signaling-Rate Range

MULTI-FUNCTION LD CARD

S2 Position 3: V.52 and V.54 Diagnostic Testing

To reset the V.54 circuit, turn switch S2 position 3 ON, then back OFF.

S2-3	Test Mode
Off	Normal Operation (default)
On	Test Disabled

S2 Positions 4 and 5: RTS/CTS Delay

Set positions 4 and 5 of switch S2 to determine the amount of time the Multi- Function LD Card waits after it “sees” RTS before it sends CTS. Possible settings are no delay, 7 ms, or 53 ms.

S2-4	S2-5	RTS/CTS Delay
On	On	7 ms (default)
On	Off	53 ms
Off	On	No delay
Off	Off	No delay

S2-6: Signaling-Rate Range

Set position 6 of switch S2 to determine the degree of asynchronous data-rate fluctuation that the Multi-Function LD Card will accept (that is, how much variance from a given frequency level the Card will tolerate).

S2-6	Signaling-Rate Range
Off	-2.5% to +1% (default)
On	-2.5% to +2.3%

S2-7 and S2-8: Word Length

Set positions 7 and 8 of switch S2 to determine the word length that the Multi- Function LD Card will expect for synchronous or asynchronous data. For example, if you are using the most common data format (1 start bit,

8 data bits, 1 stop bit, and no parity), you would use the factory-default word- length setting (10 bits).

S2-7	S2-8	Word Length
On	Off	8 bits
On	On	9 bits
Off	Off	10 bits (default)
Off	On	11 bits

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