Chapter 4 - AT Commands, S-Registers, and Result Codes

S-Register:

S5

Function:

Backspace Character

Unit:

Decimal ASCII code

Range:

0–32, 127

Default:

8 (^H)

Description: Specifies the character used by the TA to delete the previous character in the

 

command line.

S-Register:

S7

Function:

Wait for Connection (Abort Timer)

Unit:

1 second

Range:

0–255

Default:

45

Description: Sets the Abort Timer delay time, which is the length of time the TA waits for a

 

connection after dialing. If no connection is established during the specified

 

time, the TA ends the call.

S-Register:

S8

Function:

Pause Time for Comma

Unit:

1 second

Range:

n=0-255

Default:

2 (2 seconds)

Description: S8 sets the length of the pause caused by a comma inserted in a dialing

 

command. The default setting is 2 seconds, where each unit is one second.

 

S8 may be set for up to 255 seconds.

S-Register:

S10

Function:

DCD Drop Time

Unit:

50 ms

Range:

0–254, 255

Default:

20

Description: Sets the time after a carrier signal is lost before the TA disconnects. (The

 

&C2 command must be in effect.) Default setting is one second. Maximum

 

delay is 25.4 seconds (S10=254). Set S10 to 255 to cause the TA not to

 

disconnect with loss of carrier.

S-Register: S25

Function:

DTR Drop Time

Unit:

100 ms

Range:

0, 1–255

Default:

5

Description: Sets the time that DTR must remain low before TA disconnects. The S25 unit

 

value for 0 is 50 ms. For values from 1 through 255, the unit value is 100 ms.

S-register:

S30

Function:

On-line Inactivity Timer

Unit:

1 minute

Range:

n=0 Does not disconnect

 

n=1–255

Default:

0 (does not disconnect)

Description: Makes the TA disconnect a data connection if no data is transmitted or received for the specified time. It will NOT cause a POTS call (voice/modem/ fax) to disconnect. The timer restarts any time a data character passes

65