What is the proper format of a custom auto-attendant prompt?

Question

Options

• AG.711 u-law,8 kHZ, 8-bit, mono
• BG.711 a-law,8 kHz, 16-bit, mono
• CG.711 a-law,16 kHZ, 8-bit, stereo
• DG.729 ,8 kHZ, 8-bit, mono

• A
  92% (33)
• B
  3% (1)
• C
  6% (2)

Explanation

Answer A (G.711 u-law, 8 kHz, 8-bit, mono) is correct. Cisco Unity Express and Cisco Unity Connection require custom audio prompts to be recorded or converted in a very specific format: G.711 mu-law (u-law) codec, 8,000 Hz (8 kHz) sample rate, 8-bit resolution, and mono (single channel). This is the standard telephony-quality audio format used across North American VoIP systems. Answer B is incorrect because it specifies G.711 a-law (used in Europe/international) and 16-bit depth, neither of which is the CUE default. Answer C is incorrect due to a-law, 16 kHz, and stereo - none of these match the required format. Answer D is incorrect because G.729 is a compressed codec designed for low-bandwidth voice transmission, not for audio prompt playback quality in auto-attendant applications. Using the wrong format will result in playback errors or the system rejecting the uploaded audio file.

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