Document Outline

• 1 Introduction
• 2 AT Commands
  • 2.1 A – Answer
  • A/ – Repeat Last Command
  • B – Bell, ITU, V.23, or Bell202 Operation
  • 2.4 C[n] – Select Carrier Detect Option
  • 2.5 D[n...n] – Dialing String
  • E[n] – Echo Commands On/Off
  • F– Load Factory Defaults
  • 2.8 G – Guard Tone Select
  • H[n] – On-Hook/Off-Hook Control
  • 2.10 I[n] – Identification and ROM Tests
  • J[n] – PTT Test
  • 2.12 K[n] – Flow Control
  • 2.13 L[n] – Fast Connect
  • 2.14 N[n] – Data Set Ready Signal Control
  • O[n] – Return to On-Line
  • 2.16 P – Pulse Dial
  • Q[n] – Result Codes On/Off
  • 2.18 R[n] – Select Data Terminal Ready Option
  • 2.19 S[r] – Modify/Read S-registers
  • 2.20 T – Tone Dialing
  • 2.21 V[n] – Select Result Codes Numbers/Words
  • W[n] – Select Extended Result Code
  • X[n] – Select Result Code Set
  • 2.24 Y[n] – Selects Asynchronous or Synchronous Modes
  • Z – Reset Modem
  • 2.26 +++
  • 2.27 +++AT
• 3 Extended AT Commands
  • 3.1 @A[p] – Modify/Read MAC RAM Memory Value
  • 3.2 @B[p] – Modify/Read IRAM Memory Value
  • @L[n] – Set Lease Line Operation
  • 3.4 @P[n] – Alternate Pulse Dial Make/Break Ratio
  • 3.5 @T[n] – Select Test Mode
  • @Z Power Down
• 4 S-registers
  • 4.1 Setting S-registers
  • 4.2 Reading S-registers
  • 4.3 Setting/Reading S-registers While in Online Command Mode
  • 4.4 S-registers Definitions
    • S0 – AutoAnswer
    • 4.4.2 S1 – Ring Count
    • 4.4.3 S2 – Escape Code Character
    • 4.4.4 S3 – Carriage Return Character
    • 4.4.5 S4 – Line Feed Character
    • 4.4.6 S5 – Backspace Character
    • S6 – Wait to Blind Dial
    • S7 – Wait For Carrier After Dialing
    • S8 – Pause Time For Comma
    • S9 – Carrier Detect Response Time
    • S10 – Lost Carrier To Hang Up Delay
    • S11 – DTMF Dialing Speed
    • S12 – DTMF / Twist Dial Register
    • S13 – DTMF Transmit Attenuation
    • S14 – Bit Mapped Register
    • 4.4.16 S15 – Calling Tone Off Time
    • S16 – Calling Tone On Time
    • S17 – Minimum Ring Frequency Register
    • S18 – Maximum Ring Frequency Register
    • 4.4.20 S19 – Dial Tone and Busy Precise Tones Bit Mask
    • 4.4.21 S20 – Call Progress Tones Detect Type
    • 4.4.22 S21 – Bit Mapped Register
    • S22 – Bit Mapped Register
    • 4.4.24 S23 – Busy Detect Cadence Count
    • S24 – Desired DCE Speed
    • S25 – Protocol Selection Register
    • S26 – Bit Mapped Data Mode Control Register
    • S27 – Call Progress Transmit Register
    • S28 – Fast Connect, and Calling Tone Enable
    • S29 – Extended Result Selection / Cadence Type Selection
    • S30 – Bit Mapped Handshake Register
    • S31 – Bit Mapped Connect Detect Register
    • S32 – Pulse Dial Make Timer
    • S33 – Pulse Dial Break Timer
    • S34 – Pulse Dial Inter-digit Timer
    • S35 – Cadence A Min On Time of Dial Tone
    • S36 – Cadence A Max On Time of Dial Tone
    • S37 – Cadence A Min Off Time of Dial Tone
    • S38 – Cadence A Max Off Time of Dial Tone
    • S39 – Cadence B Min On Time of Dial Tone
    • S40 – Cadence B Max On Time of Dial Tone
    • 4.4.42 S41 – Cadence B Min Off Time of Dial Tone
    • S42 – Cadence B Max Off Time of Dial Tone
    • S43 – Cadence A Min On Time of Busy
    • S44 – Cadence A Max On Time of Busy
    • S45 – Cadence A Min Off Time of Busy
    • S46 – Cadence A Max Off Time of Busy
    • S47 – Cadence B Min On Time of Busy
    • S48 – Cadence B Max On Time of Busy
    • 4.4.50 S49 – Cadence B Min Off Time of Busy
    • S50 – Cadence B Max Off Time of Busy
    • S51 – Cadence A Min On Time of Ring
    • S52 – Cadence A Max On Time of Ring
    • S53 – Cadence A Min Off Time of Ring
    • S54 – Cadence A Max Off Time of Ring
    • S55 – Cadence B Min On Time of Ring
    • S56 – Cadence B Max On Time of Ring
    • 4.4.58 S57 – Cadence B Min Off Time of Ring
    • S58 – Cadence B Max Off Time of Ring
    • S59 – Bit Mapped Register
    • 4.4.61 S60 – Bit Mapped Test Control Register
    • 4.4.62 S61 – Signal Detect Register 1
    • S62 – Signal Detect Register 2
    • S63 – Precise Call Progress Detect
    • S64 – Signal Quality
    • S65 – DTMF Detect Register
    • 4.4.67 S66 – Wait for Dialtone
    • 4.4.68 S67 – Qualify Dialtone
    • 4.4.69 S68 – Test Timer
    • 4.4.70 S69 – Test Error Count
    • 4.4.71 S70 – Auto Retrain Threshold
    • 4.4.72 S71 – Originate Mode Fallback Timer
    • 4.4.73 S72 – Pulse Map, Caller-ID, BlackList
    • 4.4.74 S73 – Configuration Register 1
    • S74 – Billing Delay Register
    • S75 – Pre-Dial Call Progress Imprecise Detect Level
    • S76 – Post-Dial Call Progress Imprecise Detect Level
    • S77 – Pre-Dial Call Progress Precise Detect Level
    • S78 – Post-Dial Call Progress Precise Detect Level
    • S79 – FSK Originate Carrier Detect Level
    • S80 – FSK Answer Carrier Detect Level
    • S81 – DPSK Originate Carrier Detect Level
    • S82 – DPSK Answer Carrier Detect Level
    • S83 – QAM Originate Carrier Detect Level
    • S84 – QAM Answer Carrier Detect Level
    • 4.4.86 S85 – DTMF Transmit Level
    • 4.4.87 S86 – Flash On Time (!)
    • 4.4.88 S87 – Flash Off Time (!)
    • 4.4.89 S88 – Imprecise Filter Selection
    • 4.4.90 S89 – Data Set Ready
    • 4.4.91 S90 – RTS to CTS Turn-around Delay
    • 4.4.92 S91 – Call Progress Transmit Level
    • 4.4.93 S92 – Bit Mapped Register
    • 4.4.94 S93 – Ring Interval Register
    • 4.4.95 S94 – TIES Escape Prompt Delay Timer Register
    • 4.4.96 S95 – Caller-ID Configuration Register
    • 4.4.97 S99 – Country Codes Register
    • S100 – Idir
    • S101 – USR1x I/O
    • S102 – Direction control for USR1x
    • S103 – USR2x I/o
    • S104 – Direction control for USR2x
    • 4.4.103 S105 – Delay after any Call attempt
    • 4.4.104 S106 – Delay between 1st and 2nd attempt
    • 4.4.105 S107 – Delay between nth and n+1th attempt
    • 4.4.106 S108 – Maximum successive Failed attempts
    • 4.4.107 S109 – Delay between Series (Re-enable delay)
    • 4.4.108 S110 – Line-In-Use Configuration Register
    • 4.4.109 S111 – Line-In-Use Settle Time
    • 4.4.110 S112 – Line-In-Use Energy Detection Wait
    • 4.4.111 S113 – Line-In-Use Energy Detection Threshold
    • 4.4.112 S114(Hi)-S115(Lo) – Maximum Carrier Detect Threshold (J7)
    • 4.4.113 S116 – Parallel-Pick-Up Energy Detection Threshold
    • 4.4.114 S117 – No Activity Timeout
    • 4.4.115 S118 – Caller ID Ring Interrupt Delay
    • 4.4.116 S119 – Wait Before Connect
    • 4.4.117 S120 – Accepted Answer Tone Frequencies
    • 4.4.118 S121 – Answer Tone Qualify Time
    • 4.4.119 S122 – Parallel Pick Up Debounce Timer
    • 4.4.120 S123 – Soft Ring Detect
    • 4.4.121 S124 – V23 Half Duplex Enable
• 5 Related Documentation
• 6 Contact Information
• Revision History