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FOM-40

RAD DATA COMMUNICATIONS

FOM-40

Modem Type

Data (synchronous)

Maximum Data Rate

2048Kbps

Data Bus

External

Data Modulation Protocol

Proprietary

CONNECTIONS

Purpose

Location

Purpose

Location

X.21/G.703

CN1

Digital loopback switch

DIG

AC/DC power

CN2

Analog loopback switch

ANA

Receive fiber

RX

Remote loopback switch

REM

Transmit fiber

TX

Test pattern

PATT

ANALOG LOOPBACK

Setting

JP6

Enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

BAUD RATE

Setting

SW1

1.544Mbps

0

1.536Mbps

1

768Kbps

2

384Kbps

3

2.048Mbps

4

1.024Mbps

5

512Kbps

6

256Kbps

7

128Kbps

8

64Kbps

9

112Kbps

A

56Kbps

B

CD SIGNAL

Setting

JP2

CD forced high

Pins 1 &2 closed

CD normal

Pins 2 & 3 closed

CHASSIS TO SIGNAL GROUND

Setting

JP5

Connected

Pins 1 & 2 closed

Disconnected

Pins 2 & 3 closed

CLOCK SOURCE

Setting

JP1/A

JP1/B

JP1/C

External

Closed

Open

Open

Internal

Open

Closed

Open

Receive

Open

Open

Closed

RANGE

Setting

JP3

Long

Pins 1 & 2 closed

Short

Pins 2 & 3 closed

REMOTE LOOPBACK

Setting

JP7

Enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

V.54 DELAY

Setting

JP4

NO

Pins 1 & 2 closed

YES

Pins 2 & 3 closed

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Green

On

Power is on

PWR

Green

Off

Power is off

RTS

Yellow

On

Request to Send enabled

RTS

Yellow

Off

Request to Send disabled

TD

Yellow

On

Modem is transmitting steady SPACE

TD

Yellow

Off

Modem is not transmitting data

TD

Yellow

Blinking

Modem is transmitting data

RD

Yellow

On

Modem is receiving steady SPACE

RD

Yellow

Off

Modem is not receiving data

RD

Yellow

Blinking

Modem is receiving data

DCD

Yellow

On

Carrier signal detected

DCD

Yellow

Off

Carrier signal not detected

TEST

Red

On

Modem in test mode

TEST

Red

Off

Modem not in test mode

ERR

Yellow

On

Errors in test pattern

ERR

Yellow

Off

Good test pattern