Multi-Tech Systems MTS2SA-T-R ユーザーズマニュアル

Chapter 10 

− Modem Mode AT Commands, S-Registers, and Result Codes 

Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A) 

 

 

 seconds 

2–255 

2  Wait Time Before Blind Dialing or for Dial Tone.  

1. Sets the length of time, in seconds, that the modem will wait before 

starting to dial after going off-hook when blind dialing. This operation, 
however, may be affected by some ATX options according to country 
restrictions. The “Wait for Dial Tone” call progress feature (W dial 
modifier in the dial string) will override the value in register S6. (When 
configured for US). 

 

 

 

 

2. Sets the length of time, in seconds, that the modem will wait for dial 

tone when encountering a “W” dial modifier before returning NO DIAL 
TONE result code. (W class). Default is country-dependent. The 
modem always pauses for a minimum of 2 seconds, even if the value 
of S6 is less than 2 seconds.* 

 seconds 

1–255* 

50 Wait Time for Carrier, Silence, or Dial Tone.  

1. Sets the length of time, in seconds, that the modem will wait for 

carrier before hanging up. The timer is started when the modem 
finishes dialing (originate), or 2 seconds after going off-hook (answer). 
In originate mode, the timer is reset upon detection of answer tone if 
allowed by country restrictions. 
2. Sets the length of time, in seconds, that modem will wait for silence 
when encountering the @ dial modifier before continuing with the next 
dial string parameter. 
3. Sets the length of time, in seconds, that the modem will wait for dial 
tone when encountering a “W” dial modifier before continuing with the 
next dial string parameter. (US model.) 

The default is country dependent. * 

 seconds 

2–255 

2  Pause Time for Dial Delay. Sets the time, in seconds, that the 

modem must pause when the “,” dial modifier is encountered in the 
dial string. * 

 0.1 

s 

1–255 

6  Carrier Detect Response Time. Supported for backward 

compatibility only. No value can be written. Responds with default 
value. * 

 0.1 

s 1–255 14  Lost Carrier to Hang Up Delay. Sets the length of time, in tenths of 

a second, that the modem waits before hanging up after a loss of 
carrier. This allows for a temporary carrier loss without causing the 
local modem to disconnect. When register S10 is set to 255, the 
modem functions as if a carrier is always present. * 

The actual interval the modem waits before disconnecting is the value 
in register S10 minus the value in register S9. Therefore, the S10 
value must be greater than the S9 value or else the modem 
disconnects before it recognizes the carrier. 

 

 

 

 

For Call Waiting detection, if the modem is set to US country 

code and S10 >=16, then the modem will detect the Call Waiting tone 
and hang-up the line. If S10 <16, the modem will not detect Call 
Waiting tone. 

 0.001 

s 

50–255 

95  DTMF Tone Duration. 1. For US models, S11 sets the duration of 

tones in DTMF dialing (has no effect on pulse dialing). 
2. For other countries, S11 is a country parameter. The default is 
country dependent. * 

0.02 s 

0–255 

50 

 Defines the maximum period, in 

fiftieths of a second, allowed between receipt of the last character of 
the three escape character sequence from the DTE and sending of 
the OK result code to the DTE. If any characters are detected during 
this time, the OK will not be sent. Sending of the OK result code does 
not affect entry into command mode. *