pager
//ˈpeɪdʒər//
Noun
pagerSingular
pagersPlural
1
A small portable electronic device that receives and displays numeric or text messages, or emits a sound to alert the user of incoming calls or messages.
The doctor always carries a pager in case of emergencies.
2
A person who pages or summons others, especially in a hotel or hospital.
The pager announced the guest's name in the hotel lobby.