Specification for RJ11
| Electrical mounting | SMT |
| Mechanical mounting | on PCBs |
| Contact plating | gold-plated |
| Type of connector | RJ12 |
| Number of pins | 6 |
| Contact material | phosphor bronze |
| Height | 12.7mm |
| Type of pin configuration | 6p6c |
| Ethernet category | Cat 3 |
| Connector variant | unshielded |
| Spatial orientation | vertical |