Jelly Filled Telephone

Jelly Filled Telephone Cables are designed for reliable voice and data communication in outdoor underground and duct applications. These cables are filled with petroleum-based jelly, which acts as a moisture barrier, preventing water ingress and corrosion of conductors. They typically consist of solid annealed copper conductors, insulated with high-density polyethylene, twisted into pairs, and color-coded for easy identification. The jelly filling ensures long-term performance in harsh environments by maintaining insulation resistance. These cables are widely used by telecom companies, railways, and other utilities for landline and signaling networks.