| 摘要 |
Embodiments of the invention provide method and apparatus to allow a subscriber to enter a pre-specified digit sequence using the phone terminal's keypad to induce a special data collection mode for the impaired call. The digit sequence is handled in a special manner to avoid inadvertent selection of options in an Interactive Voice Response (IVR) system into which the subscriber may be dialed, or inadvertent triggering of network-based supplementary call services.
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