Related Clues:

• Cellphone's predecessor
• EMT accessory
• On call device
• Attention getter?
• It may go off on you
• Surgeon summoner
• Emergency summoner
• Theater annoyance
• Communicator that beeps
• Source of beeps
• Cell phone precursor
• On-call accessory
• It may give you a buzz
• Doctor finder
• Sales rep's gadget