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Telephone AccessoriesThere are 21 products.

Telephone Accessories
Extension bells, leads, etc. Telephone sockets, doublers, triplers, etc. A variety of products associated with phone lines. When fitting extra phones, or other devices, the REN (ringer equivalence number) should not exceed 4 on most lines. Most extra devices have an REN of 1. If you require a larger REN, an REN booster should be fitted.