Way back when dirt was new and I worked for a regional telephone service provider we had a device we called a hot shot. It was a buried cable splice container designed for direct burial shielded cable upto 6 pair. We could fit 12 pair in it with some care, but it was a real struggle.
Anyway... here is the description.
Plastic grease/gel filled tube open at one end. Clamp to bind the two shields together (Heavy copper shield) and hold the cables in parallel. Plastic plug with notch openings for the cable at the bottom.
Plug and tube were threaded to mate.
Typically we would prep both ends of the cable with 3-6 inches (staggered) of pairs showing and about 1 1.5 inches of the shield of both cables exposed. Put on the bond (shield) clamp. Then we would splice the pairs with UR Scotchloks. We would then place the plug between the cables and push the tube part over the spliced pairs. Then you screw the tube onto the cap pushing out any excess gel/grease. The splice was then complete. Typically I would wrap both cables with tape below the splice to hold them together and reduce strain on the bond clamp and/or Scotchloks in the event of extra pulling on the cable during completion of the repair.
A typical underground repair of this nature took two hotshots and a short piece of matching cable.
What is the proper name/manufacturer/model of this repair item?
Where can I buy them?
P.S. We had an epoxy filled splice kit with variable (cut to fit) end caps for larger cable.