Intel MD566X manual Voice DTE→DCE Character Pairs, Response Hex Code Function

56K V.92 Data, Fax, and Voice Chipset

Table 2-5. IS-101 Voice Command Summary (Continued)

+VGT=n	Volume selection	128	121–131	no
+VIP	Initialize parameter	–	–	no
+VIT=n	DTE/DCE inactivity timer	0	0–255	no
+VLS=n	Relay/speaker control	0	0–16	no
+VNH=n	Automatic hang-up control	0	0–2	no
+VRA=n	Ringback-goes-away timer	50	0–50	no
+VRN=n	Ringback-never-appeared timer	10	0–255	no
+VRX	Record mode	none	–	no
+VSD=m	Silence detection (quiet and silence)	128, 50	See note	no
+VSM=m	Compression method selection	140, 8000, 0,	See note	no
		0
+VSP=n	Speakerphone on/off control	0	0, 1	no
#VSPS=n	Speakerphone type selection	1	0, 1	no
+VTD=n	Beep tone duration timer	100	5–255	no
+VTS=m	DTMF and tone generation	none	See note	no
+VTX	Play mode	none	–	no

NOTE: See the complete command description in the MD566X Programmer’s Guide for range information.

*The noted parameters, commands, and responses depend on the capability to receive.

Table 2-6. Voice DTE→DCE Character Pairs

Response	Hex Code	Function
<NUL>	00	Do nothing
<DLE>	10	Two contiguous <DLE><DLE> codes indicate a single
		<DLE> in the data stream
<SUB>	1A	<DLE><DLE> in data stream
<ETX>	03	End transmit data state
/	2F	Start of DTMF tone shielding
<DEL>	7F	DTMF transition to off
u	75	Bump up the volume
d	64	Bump down the volume
<ESC>	1B	End receive data state
!	21	Receive data abort
<CAN>	18	Clear transmit buffer of voice data
?	3F	Transmit buffer space available query

18 Intel Confidential Programmer’s Guide