Telephone line straight cord 4 core

5. PVC jacket

4. Aluminium Foil shield with solid or stranded Drain Wire

3. PE insulation

2. stranded bare copper or tinned copper

1. Standard: UL 20251

Shiled telephone cable 4 core --- round wire:

Telephone cable shielded 4 core straight :
1. conductor material: copper, tinned copper
2.PVC: white, ivory