Telephone receiver crystal headwithGeneral RJ11 phone crystal headIt’s not the same. It’s narrower than the ordinary one. It’s used between the phone and the receiver. You can buy it after you see it clearly.
name: 4-core telephone receiver crystal head
Interface: RJ12 interface(4P4C)
Product use: mainly used to answer both ends of the telephone handset cord
This crystal head is a 4P4C phone receiver and the same interface. It is rarely used in ordinary times. Buyers should pay attention to their choice.