Compaq 850 manual Operating Parameters, Uart Transfer Rates, Transmission Modes, Table F-1

Technical Reference Guide

F.3 OPERATING PARAMETERS

The operating parameters consists of UART transfer rates and transmission modes.

F.3.1 UART TRANSFER RATES

The transfer rate between the modem’s UART and the PCI interface (also known as the DTE-to- DCE transfer rate) is selectable and generally set to match the modem’s typical transmission mode. The modem supports the standard rates of 300, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, and 115200 bps as well as the high-speed rate of 230400 bps.

F.3.2 TRANSMISSION MODES

The Compaq/Lucent V.90 56K PCI Modem supports the transmission modes listed in table F-1.

Table F-1.Operational Modes

Table F-1.

Operational Modes

Mode Standard	Transfer Type	Transfer Rate (see text below)
K56Flex (see note)	Data	56000, 54000, 52000, 50000, 48000, 46000, 44000,
		42000, 40000, 38000, 36000, 34000, 32000 bps
ITU-T V.90 (see note)	Data	56000, 54667, 53333, 52000, 50667, 49333, 48000,
		46667, 45333, 42667, 41333, 40000, 38667, 37333,
		36000, 34667, 33333, 32000, 30667, 29333, 28000
		bps
ITU-T V.34Annex12	Data	33600, 31200 bps
ITU-T V.34	Data	28800, 26400, 24000, 21600, 19200, 16800, 14400,
		12000, 9600, 7200, 4800 bps
ITU-T V.32bis	Data	14400, 12000, 9600, 7200, 4800 bps
ITU-T V.32	Data	9600, 4800 bps
ITU-T V.17	Group 3 Fax	14400, 12000 bps
ITU-T V.29	Group 3 Fax	9600, 7200 bps
ITU-T V.27ter	Group 3 Fax	4800, 2400 bps
ITU-T V.22bis	Data	2400 bps
ITU-T V.23	Data	1200 / 75 bps
ITU-T V.22	Data	1200 bps
ITU-T V.21	Group 3 Fax	300 bps
BELL 212A	Data	1200 baud
BELL 102	Data	300 baud

NOTE:

For 56K operation to occur with this device, the following criteria must be met:

-Distant end modem must support 56K modem technology and be digitally terminated.

-Transmission path must contain no more than one analog-to-digital conversion.

The criteria for 56K operation (see note under table F-1) are likely to be met when connecting to an internet service provider (ISP) through a local phone number. Note also that the 56K transfer rate applies only to receive data (i.e., “downloads”). Data will be transmitted (“uploaded”) at a maximum rate of 33.6 Kb/s.

Compaq Personal Computers F-3

Original - December 2000