Q: What is the difference between an RJ11 and an RJ12 connector?
A: Both connectors are the same size and appear the same. However looking at the contacts an RJ11 will only have 4 contacts. An RJ12 will have 6 contacts.
Q: What are the terms 4P4C 6P4C and 6P6C referring to?
A:
4P4C: 4 Position 4 Conductor ( RJ22) - used for Telephone Handset cables.
6P4C: 6 Position 4 Conductor (RJ11) - used for ADSL telephone and modem cables.
6P6C: 6 Position 6 Conductor (RJ12) - used in System phones.
Q: Which adapter or splitter should I use. Reverse or straight?
A: Newer phones can use a straight or reverse pinned line cord. If you’re unsure of the age of your phone a reverse pinned cord will work with any age phone
