15ft foot phone line cords with connectors can be used with all 2 or 4 wire systems. The cord has a variety of possible uses, such as connecting two telephones devices together, connecting a telephone device to a wall jack, or as an extension cord. Standard RJ11 6P4C phone connectors on both ends, plug and play ready for fax lines, modems, cordless or standard phones Universal 4-conductor design. Compatible with 2 line telephone cord. 100% functionally tested guaranteeing performance and integrity Package content: 2 x Telephone Extension Cord Cable, 10 x Cable Clips