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Chapter 3 – Voice Commands
Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273F) 39
Shielded
Code
Hex Event Report Description
8 (38) Event Number 4 (DTMF 8).
9 (39) Event Number 4 (DTMF 9).
0 (30) Event Number 4 (DTMF 0).
A (41) Event Number 4 (Extended Keypad DTMF A).
B (42) Event Number 4 (Extended Keypad DTMF B).
C (43) Event Number 4 (Extended Keypad DTMF C).
D (44) Event Number 4 (Extended Keypad DTMF D).
* (2A) Event Number 4 (Extended Keypad DTMF E).
# (23) Event Number 4 (Extended Keypad DTMF E).
o (6F) Event Number 5 (Receive Buffer Overrun).
c (63) Event Number 6 (Facsimile Calling).
e (65) Event Number 7 (Data Calling).
h (68) Event Number 8 (line current break). Local phone goes on hook.
H (48) Event Number 8 (line current detected). Local phone goes off hook.
s (73) Event Number 9 (Presumed Hang up "SILENCE" Timeout).
q (71) Event Number 10 (Presumed End of Message "QUIET" Timeout).
J (4A) Event Number 11 (SIT Tone).
$ (24) Event Number 12 (Bong Tone).
I (6C) Event Number 13 (Loop Current Interruption). Usually indicates a remote hang up.
L (4C) Event Number 14 (Loop Current Polarity Reversal). May indicate a hang up or a receive,
depending on CO implementation.
w (77) Event Number 15 (Call Waiting/Beep Interrupt).
t (74) Event Number 17 (TDD Detected - 1400/1800).
r (72) Event Number 18 (Ringback).
b (62) Event Number 19 (BUSY). May be repeatedly sent.
d (64) Event Number 20 (DIALTONE). May be repeatedly sent.
K (4B) Event Number 21 (Reorder/Fast Busy).
F (46) Event Number 22 (V.21 Channel 2 7E flags).
u (75) Event Number 23 (Transmit Buffer Underrun).
p (70) Event Number 24 (Line voltage increase - extension phone goes on hook).
P (50) Event Number 24 (Line voltage increase - extension phone goes off hook).
a (61) Event Number 25 (Facsimile or Data Answer).
f (66) Event Number 26 (Data Answer).
V (56) Event Number 27 (Voice Detection). A high confidence of voice.
v (76) Event Number 27 (Voice Detection). A low confidence of voice.
i (69) Event Number 29 (Stuttered Dial tone).
E (45)
Event Number 30 (Invalid Voice Data Format. Voice data is incompatible with selected Voice
Compression Methods.
Y (59) Event Number 31 (Lost Data Detected Event).
m (6d) Event Number 32 (Facsimile Answer).
% (25) Event Number 63 (manufacturer specific).
& (26) Event Number 48 (manufacturer specific).
' (27) Event Number 49 (manufacturer specific).
( (28) Event Number 50 (manufacturer specific).
) (29) Event Number 51 (manufacturer specific).
all other 7-=bit ASCII Reserved for future use.