General cords are compatible with most phone system.
Choose connector type depend on current phone system you using.
• RJ-9 Modula Jack fitable to most phone
• 2.5mm jack for phone systems which have a headset port and most codeless phone too.
• 3.5mm jack of Laptop Computer Audio Port and Earlier versions of iPhone, Galaxy and Smartphone with 3.5mm headset jack.
• USB for computer
