An interconnection junction for communications cables includes: a first connector; a second connector; and a sealing enclosure having a cavity and formed of a polymeric material, the sealing enclosure comprising an RF-isolating material. The first connector and second connector are joined and reside within the cavity of the sealing enclosure.

A coaxial juncture assembly 10 has a characteristic impedance Z.sub.0 and comprises an inner conductive formation 32 having opposed first and second ends 34.1, 34.2 which are connectable to an inner conductor of a coaxial cable and an inner conductor 18 of a port respectively. The cable has a characteristic impedance Z.sub.0 and the inner conductor has a diameter d.sub.1. The formation 32 has an outer diameter d.sub.1, which is larger than d.sub.1. A conductive tubular member 36 has an inner diameter D.sub.1, a first end 38.1, a second end 38.2, a slot 40 and an inner surface area A.sub.inner. The member 36 is connectable at end 38.1 thereof to an outer conductor of the cable and at the end 38.2 to an outer conductor of the port. The assembly 10 comprises a dielectric arrangement 42 having a dielectric constant .sub.eff. At least one of: a) .sub.eff and b) A.sub.inner is configured such that a difference between Z.sub.o and Z.sub.o is less than 3% and D.sub.1 and D.sub.1 varies by less than 5%.

A hardline cable splice block has a biased conductor receiving portion that provides enhanced electrical performance, including: a body that includes an end port and an additional port that opens in a direction perpendicular to the end port portion; an electrically conductive contact portion supported in and electrically isolated from the body; and electrically conductive receiving portions that are disposed in the end port portion and in the additional port portion and including a biasing portion. A first one of the receiving portions is engaged by a first connector via the end port portion such that the biasing portion of the first one of the receiving portions urges the housing portion of the first one of the receiving portions against the housing portion of a second one of the receiving portions and urges the housing portion of the second one of the receiving portions into engagement with the electrically conductive contact portion, and a second one of the receiving portions is engaged by a second connector via the additional port portion such that the biasing portion of the second one of the receiving portions urges the housing portion of the second one of the receiving portions into contact with the housing portion of the first one of the receiving portions and the electrically conductive contact portion such that the first and second receiving portions provide a signal pathway from an input conductor to an output conductor with reduced electrical noise so as to provide enhanced electrical performance.