Telecom Dictionary - Definitions of terms

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Nailed-Up Circuit - Deprecated term. See dedicated circuit, permanent virtual circuit. A circuit designated for exclusive use by specified users. Note: DOD normally considers a dedicated circuit to be between two users only. A virtual circuit used to establish a long-term connection between data terminal equipments (DTE). Note 1: In a PVC, the long-term association is identical to the data transfer phase of a virtual call. Note 2: Permanent virtual circuits eliminate the need for repeated call set-up and clearing.