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Call collision
In telecommunication, the term call collision has the following meanings:
1. The contention that occurs when a terminal and data circuit-terminating equipment (DCE) specify the same channel at the same time to transfer a call request and handle an incoming call.
Note: When call collision occurs, the DCE proceeds with the call request and cancels the incoming call.
2. The condition that occurs when a trunk or channel is seized at both ends simultaneously, thereby blocking a call. Deprecated synonym glare.
Source: from Federal Standard 1037C and from MIL-STD-188
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