8.6.3. User Interface 
The COM Group Call feature is involved with the initial establishment
of a call. It allows 2 or 3 digit dialing to reach a destination party.
The destination will then ring with special ringing which can be administered
via AMO.
Additional user interface items:
- The user must answer the call via Hands-Free or by lifting the handset.
- Each station (device) (e.g., prime line, and phantom line) may be a member of one or more Groups and can appear once in each Group.
- A station (Keyset or DFT) has "access to" only one COM Group, but does not have to be a member of that COM Group.
- A COM Group station can be located in a remote node. This requires that each node have a duplicate database of the COM Group members to allow all members to call each other.
- NOTE: When the destination COM Group member resides in a different node than the calling party, the call is processed as a standard A <-> B call.
- Small COM Groups consist of up to 10 members (allows for two digit dialing (e.g., one digit access code followed by one digit member number[0-9])).
- Large COM Groups consist of up to 100 members (allows for three digit dialing (e.g., one digit access code followed by a two digit member number[00-99]).
- System can be configured for up to 1,024 COM Groups.