calling

fiddler crab

Any of about 65 species of decapods (genus Uca) whose males hold one claw, always much larger than the other, somewhat like a violin. Both claws of the female are relatively small. Fiddler crabs often live in large numbers on beaches in temperate to tropical regions of the world. They inhabit water-covered burrows up to about 1 ft (30 cm) deep and feed on algae and other organic matter. Common North American species (e.g., marsh fiddler, china-back fiddler) live all along the U.S. Atlantic coast. Brightly coloured, they range in body size from about 1 to 1.2 in. (2.5 to 3 cm).

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In telecommunication, a calling-party camp-on is a service feature that enables the telephone exchange to complete an access attempt in spite of temporary unavailability of system transmission or switching facilities required to establish the requested access.

Systems that provide calling party camp-on monitor the system facilities until the necessary facilities become available, and then proceed to complete the requested access. Such systems may or may not issue a system blocking signal to apprise the originating user of the access delay.

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