Multi-Tech Systems MT3334HD8 Reading and Assigning S-Register Values, Examples of Reading Values

4 S-Registers

Reading and Assigning S-Register Values

Use the S command to assign a value to an S-register and to read an S-register’s current value.

To read an S-register value, in terminal mode, type S, the S-register number, and a question mark (?), and press ENTER. For example, to display the value of register S7, type ATS7? and press ENTER. The answer will appear as a three-digit decimal number (e.g., 045).

To assign a new value to an S-register, type S, the S-register number, an equals sign (=), and a decimal number. Convert all ASCII characters to their decimal equivalents before entering them. S-register decimal values are 0–127 for ASCII characters, and 0–255 for numeric values. To make the change permanent, use the &W0 command.

Examples of Assigning Values

1.Let’s assume you want to have longer pauses caused by the comma in a dial command: five seconds instead of two. Type ATS8=5 to assign 5 as the value for register S8. The modem will now pause five seconds for every comma in a dial command.

2.Or let’s assume that you wish to configure the modem to answer incoming calls after the thirtieth ring instead of after the first ring. To configure register S0 with a value of 30, type ATS0=30 and press ENTER.

3.Or let’s say you are calling long distance to another country code, and it is taking a long time to connect. The register S7 (abort timer) factory default 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, type ATS7=55 and press ENTER. 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.

Examples of Reading Values

1.To verify that you entered the value correctly in the preceding examples, type ATS8? and press ENTER in the first example, ATS0? in the second example, and ATS2? in the third example. You should receive the responses 005, 030, and 055, respectively.

2.When configuring S-registers, it is a good practice to include the verification read command in the same command string as the configuration assignment command. In the three preceding examples, type ATS8=5S8?, ATS0=30S3?, and ATS7=55S7?, respectively.

AT Commands that Affect S-Registers

For maximum throughput, the MT3334HD8’s default configuration is for originating a call to another 33,600 bps modem that supports error correction, data compression, and flow control. If the receiving modem is not compatible, the MT3334HD8 can match any ITU-T or Bell standard modem (but not proprietary protocols).

If you require a different configuration for your application, for example, if you want to use an MT3334HD8 modem strictly as an auto answering device, or for service that does not support error correction, you can selectively change the command parameters and S-register values in active memory and save the new values by using the &W command.

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