- Intellitouch telephone extension hold music activator (TEHMA)- For use with OHP series music-on-hold devices- Get true hold button activation on every phone extension - In order to achieve true holdbutton activation, we created a small module called a TEMHA (telephone extension hold music activator)- This line-powered activator sends a signal down the phone line telling the unit whether or not the phone is on-hold- Only phone extensionswith a TEHMA can put a call on-hold with the phone's hold button- Phones without a TEHMA can puta call on-hold by pressing the star key twice andthen pressing the phone's hold button- Like all OHP products, TEHMAs are very easy to install- Both the OHP6500 and OHP7500 ship with 2 TEHMAs- Includes: TEHMA, 4 handset line cord, cordless phone adapter cable - BlackOHP500P4