ZOOM TELEPHONICS, INC.

VFP 28.8

Card Type

Fax, Modem (asynchronous)

Chip Set

Unidentified

Maximum Data Rate

28.8Kbps

Maximum Fax Rate

14.4Kbps

Data Bus

8-bit ISA

Fax Class

Unidentified

Data Modulation Protocol

Unidentified

Fax Modulation Protocol

Unidentified

Error Correction/Compression

Unidentified

V2021

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

Line in

CN2

SERIAL PORT ADDRESS/INTERRUPT SELECTION

Setting

IRQ

JP1

JP2

COM1 (3F8h)

4

Pins 3 & 5, 4 & 6 closed

Pins 1 & 3 closed

COM2 (2F8h)

3

Pins 2 & 4, 3 & 5 closed

Pins 2 & 4 closed

COM3 (3E8h)

4

Pins 4 & 6, 1 & 3 closed

Pins 1 & 3 closed

í COM4 (2E8h)

3

Pins 1 & 3, 2 & 4 closed

Pins 2 & 4 closed

MISCELLANEOUS TECHNICAL NOTES

Note: Diagram not available.

Proprietary AT Command Set

MNP - EXTENDED SERVICES

Type:

Configuration

Format:

AT [cmds] -Kn [cmds]

Description:

Controls V.42 LAPM to MNP10 conversion

Command

Function

-K0

MNP extended services disabled

í -K1

MNP extended services enabled

-K2

MNP extended services enabled; suppress MNP extended services initiation on V.42 LAPM answer detection phase.

MNP10 - FALLBACK

Type:

Configuration

Format:

AT [cmds] -Qn [cmds]

Description:

Allows MNP10 to fall back to 2400bps

Command

Function

-Q0

MNP10 at 2400bps disabled

í -Q1

MNP10 at 2400bps enabled

MNP10 - LINK NEGOTIATION

Type:

Configuration

Format:

AT [cmds] *Hn [cmds]

Description:

Sets the speed at which MNP10 link negotiation will occur

Command

Function

í *H0

Link will be negotiated at highest possible speed

*H1

Link will be negotiated at 1200bps

*H2

Link will be negotiated at 4800bps

MNP10 - POWER LEVEL ADJUST

Type:

Configuration

Format:

AT [cmds] )Mn [cmds]

Description:

Controls automatic transmit power level adjustment during MNP 10 link negotiation

Command

Function

í )M0

Power level adjustment disabled

)M1

Power level adjustment enabled

TRANSMISSION LEVEL - CELLULAR

Type:

Configuration

Format:

AT [cmds] @Mn [cmds]

Default:

26

Range:

0,1,2-10,11-31

Unit:

-1dBm

Description:

Sets the signal level for transmission while in cellular mode

Command

Function

í @M0

-26 dBm

@M1

-30 dBm

@M2-@M10

-10 dBm

V.32 - COMPROMISE EQUALIZER

Type:

Configuration

Format:

AT [cmds] :En [cmds]

Description:

Controls V.32 compromise equalizer

Command

Function

:E0

Equalizer disabled

í :E1

Equalizer enabled