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Offering
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The call is being offered, signalling the arrival of a new call
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Dialtone
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The call is receiving a dial tone from the switch, which means that the switch is ready to receive a dialled number.
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Dialling
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The caller dials digits during the call. The dialled digits are collected by the switch. Note that neither lineGenerateDigits nor TSPI_lineGenerateDigits will put the line in the dialling state.
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Proceeding
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Dialling has been completed and the call is being routed through the exchange or telephone network. This occurs after dialling has been completed and before the call reaches the dialled party, as indicated by ring back, busy or answer.
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Connected
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The call is set-up and the connection is made. Information can flow between the source and destination addresses during the call.
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Hold
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The call is put on hold by the switch. This frees the physical line, allowing another call to use the line.
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HoldPendingTransfer
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The call is currently on hold, waiting to be transferred to another number.
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Conferenced
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The call is a member of a conference call and is logically in the connected state.
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Idle
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The call exists but has not been connected. There is no activity on the call, i.e. no call is currently active. A call can never come out of the idle state.
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