CONNECTIONS

Function

Label

Function

Label

CN1

CN3

CN2

CARRIER SIGNAL

Setting

SW2/F

Always on

Off

Follows DTR

On

CLOCK SOURCE

Setting

SW2/D

SW2/E

Internal transmit

On

On

Receive recover

Off

On

LOCAL ANALOG LOOPBACK TEST

Setting

SW1/A

Enabled

On

Disabled

Off

LOOPBACK TEST SELECT

Setting

SW4

Local analog loopback

1

Normal operation

2

Remote digital loopback

3

SPEED

Setting

SW1/E

SW1/F

SW1/G

1.2Kbps

Off

Off

Off

2.4Kbps

On

Off

Off

4.8Kbps

Off

Off

On

9.6Kbps

On

Off

On

19.2Kbps

Off

On

Off

28.8Kbps

On

On

Off

38.4Kbps

Off

On

On

57.6Kbps

On

On

On

REMOTE DIGITAL LOOPBACK TEST

Setting

SW1/B

Enabled

On

Disabled

Off

RESET

Setting

SW1/D

Reset

On

Normal operation

Off

TEST FUNCTIONS

Setting

SW1/A

Enabled

On

Disabled

Off

TEST PATTERN

Setting

SW3

Generate 511/E test pattern

1

Normal operation

2

Test pattern generator

3

FACTORY DEFAULT SETTINGS

Switch

Setting

SW1/C

Not used

SW2/A

Not used

SW2/B

Not used

SW2/C

Not used

SW2/G

Off

SW2/H

Off

V.54

Setting

SW1/H

V.54 Disabled

On

V.54 Enabled

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Green

On

Power is on

PWR

Green

Off

Power is off

TD

Red

Blinking

Modem is transmitting data

TD

Red

Off

Modem is not transmitting data

CD

Red

On

Carrier detected

CD

Red

Off

Carrier not detected

BERT

Red

On

511/E test pattern on or 511 mode errors detected

BERT

Red

Off

Normal operation in 511 mode

LOOP

Red

On

Modem is in loopback test mode

LOOP

Red

Off

Modem is not in loopback test mode