Understanding Connections

Understanding Connections

Desk Phone Ports

• RJ9: Handset jacks, some headset jacks, busy buddy
• RJ11: Wall jacks on all home phones, the CT10, the SPO2-H the Chattaway and all Polycom phones
• RJ45: the big connector that most digital phones and all computer networking cables and devices use.The size of the TEL ports in the back of Sennheiser and Plantronics wireless.
• 2.5mm: Some corded desk phones have a 2.5mm headset jack

Cordless Phone Port

• RJ11 that connect the base of the phone to the wall
• 2.5mm is the size of the headset port on the cordless phone handset

Cell phones:

• 3.5mm: Most touch screen phones have
• 2.5mm: Older phones with button you push
• Lightning port: The jack for iPhone 7 and higher