AudioCodes E-SBC User Manual page 685

CHAPTER 28 Configuring Supplementary Services
The flowchart above describes the following "double" call-hold scenario for analog interfaces:
1. A calls B and establishes a voice path.
2. A places B on hold; A hears a dial tone and B hears a held tone.
3. A calls C and establishes a voice path.
4. B places A on hold; B hears a dial tone.
5. B calls D and establishes a voice path.
6. A ends call with C; A hears a held tone.
7. B ends call with D.
8. B retrieves call with A.
Mediant 1000 Gateway & E-SBC | User's Manual
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