User's Manual

Chapter 13: Multiple Appearance Directory
Number
The Multiple Appearance Directory Number (MADN) feature operates differently depending on the type
of Communication Server. For instance, the MADN feature operates differently on the Communication
Server 2000 than the Communication Server 1000. For more information about the MADN feature and
how it operates on the communication servers, see the following sections:
• Communication Server 1000 on page 145
• Communication Server 2000 and Communication Server 2100 on page 147
Communication Server 1000
CS 1000 Multiple Appearance Directory Numbers (MADN) provides the following features:
•
Several devices (TNs) share a common Directory Number (DN).
• When the DN receives a call, all devices ring.
• You can configure two call arrangements; Single Call Arrangement (SCA) and Multiple
Call Arrangement (MCA).
Single Call Arrangement
Single Call Arrangement (SCA) MADN allows only a single active call on the DN, regardless
of the number of DN appearances:
• A call on a DN appearance makes all other appearances busy (they cannot receive or
make calls).
• Activity on one DN appearance reflects on other appearances; this is achieved by using
the Event Dialog SIP feature. For more information, refer to RFC 4235.
• SCA MADN provides Automatic Privacy for telephones that share a DN. When a call is
in progress on the DN, no other telephone on which the DN appears can bridge into the
call, unless the call is put on hold
• Telephones with a Privacy Override Allowed (POA) Class of Service can bridge into an
established call on an SCA MADN. However, you cannot bridge into a call until the call
establishes.
• Any user with the MADN SCA feature can put a call on hold. Any other user in the group
can pick up the held call by accessing the line key with SCA provisioned.
• The state of the user’s group is reflected in the line key icon. Three states are available;
idle, active, and held. For more information about line key icons, see the applicable IP
Deskphone User Guide.
SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013 145