Intel MD566X manual Stant carrier mode

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

Table 3-4. Data Mode Command Descriptions (Continued)

Select ITU-T or Bell∗: This command selects the ITU-T or Bell configuration for the modem.

	n = 0	Selects ITU-T V.22 when the modem is at 1200 bps and ITU-T V.21
		when the modem is at 300 bps.
	n = 1**	Selects Bell 212A when the modem is at 1200 bps and Bell 103J
		when the modem is at 300 bps.
	n = 2	Selects ITU-T V.23 modulation connections only (that is, the mo-
Bn	1	dem does not connect for any other speed or modulation). The orig-
		inating modem transmits at 75 bps (and receives at 1200 bps), and
		the answering modem transmits at 1200 bps (and receives at 75
		bps).
	n = 3	Selects ITU-T V.23 modulation connections only (that is, the mo-
		dem does not connect for any other speed or modulation). The orig-
		inating modem transmits at 1200 bps (and receives at 75 bps), and
		the answering modem transmits at 75 bps (and receives at
		1200 bps).

		Carrier Control Option: This command is reserved for selecting between
		controlled carrier or constant carrier modes. This modem supports only con-
Cn	1	stant carrier mode.
		n = 0	Transmit carrier always off (returns an ERROR message)
		n = 1**	Normal transmit carrier (constant carrier)

42 Intel Confidential Programmer’s Guide