Abstract: A communication cable can comprise twisted pairs of electrical conductors for transmitting electrical signals and bundles of optical fibers for transmitting optical signals. The electrical signals and/or the optical signals can support voice and digital communication or data transmission. The twisted pairs can be disposed along a central axis of the communication cable. Each bundle of optical fibers can be disposed in a respective buffer tube. The buffer tubes can be arranged in a ring around the twisted pairs. The communication cable can be configured to manage strain on the optical fibers without subjecting the twisted pairs to deleterious tensile stress. The communication cable can include an outer jacket sized for insertion in a conduit running along a railway or other transportation line.

Abstract: A communication cable can comprise twisted pairs of electrical conductors for transmitting electrical signals and bundles of optical fibers for transmitting optical signals. The electrical signals and/or the optical signals can support voice and digital communication or data transmission. The twisted pairs can be encased in a gelatinous material and disposed along a central axis of the communication cable. Each bundle of optical fibers can be disposed in a respective buffer tube. The buffer tubes can be arranged in a ring around the twisted pairs. The communication cable can be configured to manage strain on the optical fibers without subjecting the twisted pairs to deleterious tensile stress. The communication cable can include strength rods embedded in an outer jacket, with the outer jacket sized for insertion in a conduit running along a railway or other transportation line.

Abstract: A drop cable supportable in a drop cable clamping assembly includes a conductive, non-conductive, or combination conductive and non-conductive core enclosed by an extruded cable jacket of thermoplastic material. The cable jacket has a flattened top surface and a flattened bottom surface, either or both of which is provided with a friction engaging surface consisting of indentations or projections formed by one or more rollers following extrusion of the cable jacket and operatively configured for engagement by a clamping surface of the clamping assembly.