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Ribbon Communications Features
The following features are available when your administrator configures your phone with Ribbon 
Communications.
Ribbon Communications Multiple Appearance Directory Number - Single 
Call Appearance
Register your phone with the Ribbon Communications server to use Multiple Appearance Directory 
Number - Single Call Appearance (MADN-SCA). With MADN-SCA, you can share a single line with other 
contacts in a Multiple Appearance Directory Number (MADN) group.
System administrators assign members to MADN groups. MADN groups support a maximum of 32 
members. Any MADN member can place, answer, hold, resume, or barge in on calls on the shared line. 
Additionally, all group members can view the status of a call on the shared.
Check with your system administrator to find out if this feature is available on your phone.
Placing a MADN Call
Any MADN member can place a call on the shared line. When a member places a call on the shared line, 
the other members are notified with a steady red LED light on the line key of the members' phones. 
Only one call at a time can be active on the shared line. If a call is placed to the shared line with an 
active call in place, the incoming call is sent to voicemail.
Answering a MADN Call
Any incoming call to the shared line rings on all group members' phones simultaneously. The call is 
displayed on all members' screens, and a green LED light flashes on the line's line key. 
Any MADN member can respond to an incoming call to the shared line. When a MADN member 
answers an incoming call, the LED indicator on the line key for all phones changes to a steady red light 
to indicate the call was answered. Members can also view the status of a call on the shared line by 
pressing and holding the corresponding line key for one second. The call's status and the Barge In soft 
key display for five seconds. 
If bridging is disabled and privacy is enabled for the shared line, you cannot barge in on active calls 
answered by other MADN members.
Barge In on an Active Call
After a call is answered, any group member can barge in on the active call on a public shared line, 
which becomes a bridge call—a call between two or more MADN members and another party.
Ask your system administrator about the maximum number of participants allowed on a bridge call.
Procedure
1.  Press and hold the corresponding line key for the shared line for one second.
2.  Select the Barge In soft key.
A bridge tone plays notifying the other call participants that you are barging in on the call.