User's Manual 574 Document #: LTRT-27055
Mediant 1000B Gateway & E-SBC
The device also supports "double call hold" for FXS interfaces where the called party,
which has been placed on-hold by the calling party, can then place the calling party on hold
as well and make a call to another destination. The flowchart below provides an example of
this type of call hold:
Figure 27-1: Double Hold SIP Call Flow
The flowchart above describes the following "double" call-hold scenario:
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.
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