In this episode we see that Rory has a pager, which Lane contacts her on. In a later episode it is possible to see that it is an American Online (AOL) pager.
A pager is a wireless telecommunications device that receives and displays messages, or receives voice messages sent from a telephone. They came into use in the 1950s, and became widespread during the 1980s. Their use declined markedly during the 2000s with the rise of mobile phones that allow text messaging and voicemail.
The Annotated Gilmore Girls 
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