Intel MD566X manual Compression Method Selection, +VSM=m Manufac, Vsr, Hard Disk, Turer, Specified

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

Table 6-1. Voice Mode Command Descriptions (Continued)

Compression Method Selection: (cont.)

Transmission: Range: n = 0

n = 0* Disabled

When receiving voice, this parameter changes the level of noise that the DCE treats as silence. A higher “n” number raises the threshold of noise detection.

Reception: Range: n = 0
n = 0*	Disables DCE silence compression
n =increments of 1	Raises noise detection threshold

+VSM=m

manufac-

<sel> Silence Expansion: This command enables the DTE to modify the amount of silence expansion. This parameter represents the maximum period of silence the DCE expands a period of silence compressed by the <scs> parame- ter. The DCE ignores the <sel> parameter if <scs> is zero.

<cml>	<vsr>	Serial	UART	Hard Disk
	Sampling	Data Rate	Data Rate		Note
Compression				(Bytes/sec.)
	Rate	(bps)	(bps)
<cml> = CL1*	4800	48,000	57,600	4800
	7200	72,000	115,200	7200	1
	8000	80,000	115,200	8000	1
	9600	96,000	115,200	9600	1
	11025	110,250	115,200	11,025	1

(cont.)

turer-

<cml> = AD3 4800 18,000 19,200 1800

specified

	7200	27,000	38,400	2700
	8000	30,000	38,400	3000
	9600	36,000	38,400	3600
	11025	41,344	57,600	4135
<cml> = AD4	4800	24,000	38,400	2400
	7200	36,000	38,400	3600
	8000	40,000	57,600	4800
	9600	48,000	57,600	4800
	11025	55,125	57,600	5513
<cml> = LIN1	4800	48,000	57,600	4800
	7200	72,000	115,200	7200	1
	8000	80,000	115,200	8000	1
	9600	96,000	115,200	9600	1
	11,025	110,250	115,200	11,025	1

<cml> = LIN2 4800 96,000 115,200 9600 1

NOTES:

1)Because of the high UART data rates, these compression/sample rates may not be applicable to the serial host interface (that is, serial box modem) designs (see ATI5 to determine if the modem is using the serial host inter- face). For parallel and PC Card host interfaces, the modem ignores the UART data rate.

2)DTMF detection is provided for all sample rates.

Programmer’s Guide Intel Confidential 95