Meanings of short rings in English

Then come two short rings from one of the rooms down to the hall.

Then it was broken by the sound of the telephone-twolong and two short rings.

There were three short rings and then a dreadfully cheerful, "Hello!"

Before her mother could form an answer, the one long and two short rings came on the phone.

You have to give three short rings, three long ones and three short ones, that's the code for returning observers.'

There was the elevator waiting as Garrick gave the five short rings at the nightbell and the outside door was unlocked.

Three short rings, three long rings and three short rings -that was all that could be any use to her now.

She hurried to the house on the next street and rang the bell violently, and waited; then she rang it again, three short rings.

Madame Boleski ascended leisurely the shallow stairs-therewas no lift-andrang her three short rings, which Peter, the Russian servant, was accustomed to expect.