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MCI-23

XIRCOM, INC.

MCI-23

Card Type

ISDN DSU

Chip Set

Unidentified

I/O options

Unidentified

ISDN Transfer Rate

64Kbps x 23

Data Bus

16-bit ISA

Switch Type

5ESS, DMS-100, MD-110

CONNECTIONS

Function

Label

Function

Label

Line B out

CN1

Used only on CSU/DSU model

CN4-CN7

Line A out

CN2

Daughterboard headers

CN8-CN10

Diagnostic port

CN3

MVIP bus - not used on this model

CN11

BASE I/O ADDRESS

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

SW1/9

SW1/10

0000h

On

On

On

On

On

On

On

On

On

On

0010h

On

On

On

On

On

On

On

On

On

Off

0020h

On

On

On

On

On

On

On

On

Off

On

0030h

On

On

On

On

On

On

On

On

Off

Off

0040h

On

On

On

On

On

On

On

Off

On

On

01E0h

On

On

On

On

On

Off

Off

Off

Off

On

3FB0h

Off

Off

Off

Off

Off

Off

Off

On

Off

Off

3FC0h

Off

Off

Off

Off

Off

Off

Off

Off

On

On

3FD0h

Off

Off

Off

Off

Off

Off

Off

Off

On

Off

3FE0h

Off

Off

Off

Off

Off

Off

Off

Off

Off

On

3FF0h

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

Note: A total of 1023 base address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/1 is the Most Significant Bit and switch SW1/10 is the Least Significant Bit. The switches have the following decimal values: SW1/1=8192, SW1/2=4096, SW1/3=2048, SW1/4=1024, SW1/5=512, SW1/6=256, SW1/7=128, SW1/8=64, SW1/9=32, SW1/10=16. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED1

Yellow

On

Carrier signal not detected on port A

LED1

Yellow

Off

Carrier signal detected on port A

LED2

Yellow

On

Carrier signal not detected on port B

LED2

Yellow

Off

Carrier signal detected on port B

LED3

Green

On

Board is active

LED3

Green

Off

Board is not active

LED4

Yellow

On

Board has failed

LED4

Yellow

Off

Board is operating normally