JK Audio innkeeper 4 - Manual (Page 8)

Conference(innkeeper 2 only)
One press of the conference button will join the audio paths of
both line one and line two, providing there are calls present on
both lines.
A second press of the conference button will break the audio
paths between the calls.
An auto-dropped or manually dropped line will automatically
break the conference.
By default line1 send and line 2 send audio will be mixed
together digitally and sent into both phone lines. Line 1 caller will
also hear line 2 caller audio. Line 2 caller will also hear line 1
caller audio. In the menu this configuration is referred to as
Send-Mix, Caller-No Mix. This default configuration is by far the
most widely used. Advanced options are available for
Conference mode however in most situations it is not necessary
to change these options from the default.
Operation - Conference
8