To specify electronic systems environment
| Position | Element | Name | Type | Min/Max | Repeat | |
|---|---|---|---|---|---|---|
| 1 | 709 | Communications Environment Code | Mandatory | ID | 2/2 | AtMax 1 |
| 2 | 365 | Communication Number Qualifier | Mandatory | ID | 2/2 | AtMax 1 |
| 3 | 364 | Communication Number | Mandatory | Alphanumeric | 1/2048 | AtMax 1 |
| 4 | 66 | Identification Code Qualifier | Rel | ID | 1/2 | AtMax 1 |
| 5 | 67 | Identification Code | Rel | Alphanumeric | 2/80 | AtMax 1 |