Network Adapter MTA128ST MTA128NT User Guide

AT Commands, S-Registers, and Result Codes
MTA128ST/NT 29
S-Registers
S-registers are sections of memory in which values are stored that affect how the TA operates. S-registers
are so-called because each has a name that begins with the character S. Use the Sr=n command to
assign a value to an S-register or use the Sr? command to read the current value of an S-register. S-
registers are stored in non-volatile RAM (NVRAM) by using the &W0 command. ATZ<CR> restores S-
registers to values stored in NVRAM if any were stored using the &W0 command, otherwise they revert to
factory default settings in ROM. Table 4-2 summarizes the available S-registers and their function.
See the additional documents on this CD for more information on each S register.
S-Register Summary
S-Register Function
S0 Rings Until Answer
S1 Ring Count
S2 Escape Character
S3 Carriage Return Character
S4 Line Feed Character
S5 Backspace Character
S7 Wait for Connection (Abort Timer)
S8 Pause Time for Comma
S10 DCD Drop Time
S25 DTR Drop Time
S26 Delay DTR Monitoring After Connect
S27 RS-232 CLEAR Synchronization Sequence
S29 On-line Inactivity Timer Period
S30 On-line Inactivity Timer
S31 Maximum Re-dial Timeout Value
S32 Escape Sequence Timeout
S34 Maximum Escape Sequence Length
S44 POTS Port Ring Frequency
S45 Use Dial Tone From Central Office
S46 Pulse-Dial Recognition
S49 POTS Port Dial Tone Gain
S50 Caller Line ID (CLI)
S51 POTS Port Dial Tone Suppression
S52 Auto-Protocol Detection
S53 Maximum X.75 Buffer Size
S54 Force 56Kbps B-Channel Data Rate
S55 Information Transfer Capability for POTS Port Calls
S56 Calling Party Number Information Element Settings
S57 Called Party Number Information Element Settings
S58 Client-side PPP/ML-PPP Authentication Protocol Negotiation
S59 Dynamic Bandwidth Allocation (DBA) Scheme
S60 Bandwidth-On-Demand (BOD) High Threshold Sampling Period
S61 Bandwidth-On-Demand (BOD) High Throughput Threshold
S62 Bandwidth-On-Demand (BOD) Low Threshold Sampling Period