10.53.1.3. Station Controlled Conference in the Private Network 
It is possible to create large conferences in the network by adding a remote party
located in
another node, and then that party create a conference in their own node. There is
no
restriction in the total number of conference participants in a network wide conference
other
than the availability of the conference resources themselves and the local restriction
of
eight parties per conference circuit.
Figure 113. Conference using two conference modules
A remote conference member without its own conference (station 4104 in the above diagram)
located in another PINX(Private Integrated Network Exchange)has some limitations including
- Not being allowed to delete conference members,
- Local member can consult with a remote member but not with other local members whereas remote members are not restricted,
- Not receiving notification of members added/leaving/holding the conference, and
- Not being able to scroll through the conference member list.
When a station is a remote conference member i.e without it's own conference, signalling
of
supplementary services shall occur to the conference (e.g., user suspended).
Whereas, when a chained conference exists (i.e., two or more conference circuits connected
together as is Conference 1 and Conference 2 in the figure above), signalling of supplementary
services which the remote members invoke shall not be signalled to the remote conference.
Backward compatibility to the US and IM installed bases is provided.