| 0500-0BA20M | 25397 | CORTELCO USA INC |
| 329C | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| 329CTELPH0NESET | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| 500DR553 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| 500DRW3 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| 500DW3 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| N802CSA | 04773 | GTE COMMUNICATION SYSTEMS CORP |
| NB802CSA | 04773 | GTE COMMUNICATION SYSTEMS CORP |
| 550144-1 | 28528 | ITT INDUSTRIES INC ITT AEROSPACE COMMUNICATIONS DIV EAST |
| 550144-2 | 28528 | ITT INDUSTRIES INC ITT AEROSPACE COMMUNICATIONS DIV EAST |
| GA51859 | 64959 | AMERICAN TELEPHONE AND TELEGRAPH CO |
| GA51859 | 70408 | AT AND T CORP |
| TA236FT | 80058 | JOINT ELECTRONICS TYPE DESIGNATION SYSTEM |