Address Format
A DIT-MCO address can contain up to six digits, depending on the size of the switching system.
Leading zeros are optional because NETS automatically assumes them.
For example:
| Entered | NETS Reads |
|---|---|
| 303 | 00303 |
| 5 | 00005 |
| 104 | 00104 |
Each digit within the address identifies a specific location within the switching system.
Address Numbering Rules
One of the most common questions involves the numbering of connector pins.
DIT-MCO addresses are numbered:
00 – 49
There is never a 50–99 address during normal operation.
The only exception is when performing Latching Matrix testing.
💡 Tip: If you're looking for Address 75, you've likely confused the connector number with the address number.
Understanding an Address
Example:
00303
This address represents:
| Portion | Meaning |
|---|---|
| 0 | Bay |
| 0 | Module |
| 3 | Connector |
| 03 | Pin Address |
This tells the tester exactly where that connection exists within the switching system.
Connector Numbering
The front panel connectors are labeled with address ranges to simplify locating the correct connector during setup and troubleshooting.
Connector Address Ranges
Each connector contains 50 address locations.
Example:
| Connector | Address Range |
|---|---|
| 0 | 0000–0049 |
| 1 | 0100–0149 |
| 2 | 0200–0249 |
| 3 | 0300–0349 |
| 4 | 0400–0449 |
| 5 | 0500–0549 |
Pin-to-Address Cross Reference
DIT-MCO numbering does not match the physical connector pin numbers sequentially.
For example:
Connector Pin Cross Reference Chart
Always refer to the connector cross-reference when locating addresses on the tester.
Common Mistakes
Looking for Address 50
Remember that DIT-MCO addresses range from 00–49.
Forgetting Leading Zeros
NETS automatically assumes leading zeros, so entering:
303
Is interpreted as:
00303
Mixing Up Pins and Addresses
Physical connector pin numbers and DIT-MCO addresses are different. Always use the cross-reference chart to locate the correct point on the connector.