| Name | Size | Description | |
|---|---|---|---|
![[DIR]](/css/icons/Folder.gif){kind=icon} | Parent Directory | - | |
![[ ]](/css/icons/Acrobat.gif){kind=icon} | 500-110-100-i05_1965-10-01.pdf | 348K | Transmission zoning |
| 500-112-100-i05_1973-01-01.pdf | 1.0M | Inductive noise Reference |
| 500-112-100-i08_1973-01-01.pdf | 1.0M | Inductive noise Reference |
| 500-112-100-i08_1973-01-02.pdf | 1.0M | Newer Issue |
| 500-112-100-i10_1977-12-02.pdf | 130K | Newer Issue |
| 500-114-100-i04_1971-08-01.pdf | 2.1M | Ringing limitations |
| 500-114-100-i06_1978-07-01.pdf | 421K | Ringing limitations |
| 500-114-100-i06_1978-07-02.pdf | 421K | Newer Issue |
| 500-114-100-i10_1971-08-02.pdf | 2.2M | Newer Issue |
| 500-116-400-i01_1962-02-01.pdf | 79K | Ringer connections, tip-party identification, for stations connected to long-line equipment |
| 500-150-100-i01_1970-04-01.pdf | 464K | Radio signal suppression for telephone sets |
| 500-150-100-i06_1970-04-01.pdf | 778K | Radio signal suppression for telephone sets |
| 500-150-100-i06_1970-04-02.pdf | 778K | Newer Issue |
| 500-150-100-i10_1979-11-02.pdf | 674K | Newer Issue |
| 500-810-200-i02_1969-12-01.pdf | 189K | Packaging and handling, disconnected station apparatus Reference |