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# 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
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-----------------+-------+-----------------------+----------|
| Line B out | CN1 | Used only on CSU/DSU | CN4-CN7 |
| | | model | |
|-----------------+-------+-----------------------+----------|
| Line A out | CN2 | Daughterboard headers | CN8-CN10 |
|-----------------+-------+-----------------------+----------|
| Diagnostic port | CN3 | MVIP bus - not used | CN11 |
| | | on this model | |
+------------------------------------------------------------+
+--------------------------------------------------------------------+
| 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) |
+--------------------------------------------------------------------+
(IMG) IMG 2
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+