User's Manual 570 Document #: LTRT-10532
Mediant 500L 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:
4. A calls B and establishes a voice path.
5. A places B on hold; A hears a dial tone and B hears a held tone.
6. A calls C and establishes a voice path.
7. B places A on hold; B hears a dial tone.
8. B calls D and establishes a voice path.
9. A ends call with C; A hears a held tone.
10. B ends call with D.
11. B retrieves call with A.
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