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Chapter 4 – Voice Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 121
Flow Control
XON/XOFF flow control is used by the SocketModem to match the PC-to-modem data rate to the
line-signaling rate, as well as to the requirements of analog conversion of the voice signals and voice
data.
In-band, uni-directional XON/XOFF flow control is mandatory. RTS/CTS (V.24 circuits 106 and 133)
flow control is optional per the IS-101 standard.
Voice Mode Result Codes
In Voice mode, the modem can detect and report DTMF, detect call progress tone and cadence
events, evaluate voice quality, and can monitor telco-related activities. Events can be reported as a
single character (Simple or "Terse" reporting), a full-text message (Message or "Verbose" reporting),
or as a repeating pattern (Pattern reporting).
Terse
Verbose
0 Caller ID Report
1 DID Report
2 Distinctive Ringing
3 RING
4 DTMF Received
5 Receive Buffer Overrun
6 Facsimile Calling (e.g., 1100 Hz)
7 Data Calling (e.g., 1300 Hz)
8 Local Phone On/Off Hook
9 Presumed Hang Up (SILENCE) Time-out
10 Presumed End of Message (QUIET) Time-out
11 SIT Tone (CO Standard Information Tones, sent to pay phones)
12 Bong Tone (Calling Card Tone)
13 Loop Current Interruption
14 Loop Current Polarity Reversal
15* Call Waiting Beep/Interrupt*
16* Distinctive Call Waiting*
17* TDD Detected (e.g., 1400/1800 Hz)*
18 Ring Back/Remote Ring
19 BUSY
20 DIALTONE
21 Reorder/Fast Busy
22 V.21 Channel 2 7E Flags
23 Transmit Buffer Under Run
24 Extension Phone On/Off Hook
25 Facsimile or Data Answer (e.g., 2100 Hz)
26 Data Answer (e.g., 2225 Hz)
27 Voice Detect
28 Call Waiting Plus Caller ID
29 Stuttered Dial Tone
30 Invalid Voice Data Format
31 Lost Data Detected Event
32 Facsimile Answer
33-63 Reserved for future standard
above 63 Manufacturer specific
_____
* Further study required for final specification.
The TIA/EIA-602 CONNECT result code is disallowed in voice mode.