Chapter 7 – Voice Commands

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 109
Table 7-6. Events Detectable in the Voice Mode per V.253
Event Number Event Description Event Reporting
0Caller Id Report Message
1DID Report Message
2Distinctive Ringing Pattern
3RING Simple
4DTMF Received Simple
5Receive Buffer Overrun Simple
6Facsimile Calling (e.g., 1100 Hz) Simple
7Data Calling (e.g., 1300 Hz) Simple
8Local Phone On/Off-hook Simple
9Presumed Hangup (SILENCE) Time-out Simple
10 Presumed End of Message (QUIET) Time-out Simple
11 SIT Signal Simple, Message
12 Bong Tone Simple
13 Loop Current Interruption Simple
14 Loop Current Polarity Reversal Simple
15 Call Waiting Beep/Interrupt Simple
16 Distinctive Call Waiting Simple
18 Ringing Tone Simple
19 BUSY Simple
20 DIAL TONE Simple
21 Reorder/Fast Busy Simple
22 V.21 Channel 2 7E flags Simple
23 Transmit Buffer Underrun Simple
24 Extension Phone On/Off-hook Simple
25 Facsimile or Data Answer (e.g., 2100 Hz) Simple
26 Data Answer (e.g., 2225 Hz) Simple
27 Voice Detect Simple
29 Stuttered Dial tone Simple (note 1)
30 Invalid Voice Data Format Simple
31 Lost Data Detected Event Simple
32 Facsimile Answer Simple
Legend:
This table lists events without any regard as to whether the DCE reporting of the event is
optional or mandatory, and without assigning a DCE reporting mechanism.
The first column lists the event number assignment for each event. The event number also
serves another purpose; each number is a bit position in a bit field. Event number 0 is the
most significant bit of the left most hex number in a hex representation (V.253 defines a
total of eight hex digits). The final bit in the bit field occupies the least significant bit position
of the right-most hex number. The bit representations of the event numbers are used in the
+VLS= command.
The third column lists whether a single character is enough to report the event, or if the
DCE must supply a more complicated report. The description Simple indicates a single
character response (<DLE> shielded), Message indicates a full text message (<DLE><X>
packet), and Pattern indicates a repeating Message.
Notes:
1. The use of complex event reporting for Stuttered Dial tone is for further study.