
Appendix A. AT Commands and 
S53 CALL TYPE
S54 PROTOCOL
TYPE
S58 CALL SCREEN-
ING
Call type (Dial service only). 0=Speech
1=Audio
2=56 Kbps data 3=64 Kbps data
Rate adaption protocol type. 2=Async BONDING 5=V110
6=V.120
11=Fallback
12=PPP 
Allows the Express XRT to screen incoming calls.
0=Answer any call
1=Answer only calls from numbers match- ing those stored in SN0 through SN9.
SS60  | SPID1 LOC | SPID string location (only for use in North  | ||
  | 
  | America).  | ||
SS61  | SPID2 LOC | SPID string location (only for use in North  | ||
  | 
  | America).  | ||
SS62  | LDN1 LOC | ISDN phone number string location.  | ||
SS63  | LDN2 LOC | ISDN phone number string location  | ||
S65  | AUTOSPID | Sets the AutoSpid determination feature  | ||
  | 
  | (only for use in North America).  | ||
  | 
  | 0=Disable (default)  | ||
  | 
  | 1=Enable  | ||
SS67  | AREA CODE | Area code location (only for use in North  | ||
  | 
  | America).  | ||
S71  | DTE RATE | Selects the DTE connector bit rate.  | ||
  | 
  | 3 = 1200  | ||
  | 
  | 6 = 2400  | ||
  | 
  | 8 = 4800  | ||
  | 
  | 11  | =  | 9600  | 
  | 
  | 15  | =  | 19200  | 
  | 
  | 17  | =  | 38400  | 
  | 
  | 20  | =  | 57600  | 
  | 
  | 23  | =  | 115200  | 
  | 
  | 25  | =  | 230400  | 
S72  | DATA BITS | Selects the number of asynchronous data  | ||
  | 
  | bits.  | 
  | |
  | 
  | 0 = 8 bits  | ||
  | 
  | 1 = 7 bits  | ||
Express XRT User Guide  | 67  |