Independent Telephone Network's ITN 451/10 - 10/PACK - Telephone Adapter 4-Prong to Modular Telephone, converter allows you to plug your old 4-prong rotary phone into a modern RJ-11 modular wall outlet. Ideal telephone Adapter for 1- or 2- telephone lines or small business telephone services. Standard USOC Wiring 4-conductor, 6-position (6P4C) RJ11. No tool needed. Engineered / Designed in the USA and Made to the high-quality old-school Telco standards. ed/hb
Note:
Designed for analog phone lines, POTS (Plain old telephone service). Should be compatible with 4-conductor digital Touch Tone phones. Please check with your telephone tech before ordering.
If you have a rotary dial or pulse dialing telephones, this is not compatible with VOIP to make calls. Maybe you could only receive calls. Please check with your provider before ordering, if you are calling over a VOIP circuit.