Specification

Compatibility

Data	CCITT V.32bis CCITT V.32 CCITT V.22bis CCITT V.22 Bell 212A Bell 103	14400 bps Sync / Async (TCM modulation) 9600 bps Sync / Async (TCM / QAM modulation) 2400 bps Sync / Async (QAM modulation) 1200 bps Sync / Async (DPSK modulation) 1200 bps Sync / Async (DPSK modulation) 300 bps Async (FSK modulation)
Fax	CCITT V.17 CCITT V.29 CCITT V.27ter CCITT V.21	14400 bps (TCM modulation) 9600 bps (QAM modulation) 4800 bps (DPSK modulation) 300 bps Channel-2 (FSK modulation)

Error Correction

CCITT V.42, MNP 2-4

Data Compression

CCITT V.42bis, MNP5

Internal Modem COM Ports

COM 1 (3F8)
COM 2 (2F8)
COM 3 (3E8)
COM 4 (2E8)

Internal Modem IRQ Selection

2, 3, 4, 5

Data Format

14400 / 9600 / 2400 / 1200 bps
7 data bits; 1 or 2 stop bits; odd, even, or fixed parity
8 data bits; 1 or 2 stop bits; no parity 300 bps
7 or 8 data bits; 1 or 2 stop bits; odd, even, or no parity

Fax group

Group III Send / Receive Standard

Fax Command

EIA / TIA-578 Service Class 1, EIA / TIA-SP2388 Service Class 2

Operation

Full / Half Duplex

Command Buffer

40 characters

Dialing Capability

Touch-tone and rotary-pluse dialing

Transmit Level

-12 dBm ± 1dB

Receiver Sensitivity

-43 dBm

Interface

IBM PC Bus

Modem UART

16C550

Diagnostics

Local Analog Loopback (L3)
Local Analog Loopback (L3) with Self Test
Local Digital Loopback
Remote Digital Loopback (L2)
Remote Digital Loopback (L2) with Self Test

DTMF tone symbols

0-9, A-D, #,*

Line Impedance

600 ohm ± 20%

Line Current

20 - 80 mA

Ring Detector

40 - 150 Vrms @ 20 - 68 Hz

Audio Speaker

Software adjustable volume

Temperature

Operating 0 to 55 șC
Non-operating -20 to 80 șC

Configuration

SW1

COM Port	IRQ	SW1-1	SW1-2	SW1-3	SW1-4	SW1-5	SW1-6
1	4	ON	ON	OFF	OFF	ON	OFF
2	3	OFF	ON	OFF	ON	OFF	OFF
3	5	ON	OFF	OFF	OFF	OFF	ON
4	2	OFF	OFF	ON	OFF	OFF	OFF