Black Box MD1641A, MD1640A Reading and Assigning S-Register Values, Examples of Assigning Values

SERIES II INTELLIGENT DATA/FAX MODEMS

6.2 Reading and Assigning S-Register Values

The S command is used to assign a value to, and to read the current value of, an S-Register. To read an S-Register value, enter the letter S followed by the S-register number and a question mark (?), then hit RETURN. For example, entering ATS7? and hitting RETURN displays the value of S-Register S7 in a 3-digit decimal form. The number 8 would appear as 008, the number 30 would appear as 030, and the number 255 would appear as 255.

To assign a value to an S-Register, enter the letter S followed by the S-Register number and an equals sign (=), and then a decimal response to the message “ENTER THE NEW VALUE IN DECIMAL FORMAT”. Convert all ASCII characters to their decimal equivalents before entering them. S-Register decimal values range from 0-127 for ASCII characters, or 0-255 for numeric values.

6.2.1 Examples of Assigning Values

1.Let’s say you wish to have longer pauses caused by the comma in a dial command; five seconds instead of two. Entering ATS8=5 assigns 5 as the value for S-Register S8 (meaning the modem pauses five seconds for a comma in a dial command).

2.In a second example, let’s say that you wish to configure the Series II Modem to answer incoming calls after the 30th ring instead of after the first ring. To configure S-Register S0 with a value of 30, enter ATS0=30 and hit RETURN.

3.In a third example, let’s say you are calling long distance to another country code, and it is taking a long time to connect. The S-Register S7 (Abort Timer) setting of 45 seconds, is insufficient. The abort timer times out and cancels the call before a connection is made. To change the S7 value to 55 seconds, enter Command mode, then enter ATS7=55 and hit RETURN. Now, after dialing, the modem allows 10 more seconds for a carrier signal before aborting the call. The additional 10 seconds should provide enough time for international calls.

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