An electrical device allowing one-way or two-way communication.
- Some systems allow you to use another handset as the intercom instead of the base station.
- It helps to have more than one communication system like intercoms, telephones and radios, according to Layne.
- Could it be time to install two-way intercoms in all carriages, so that we can offer a cheery hello to the driver whenever we set foot on a train?
World War II: abbreviation of intercommunication.
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