Avaya 1140E - Multiple Appearance Directory Number

Multiple Appearance Directory Number
Multiple Appearance Directory Number(MADN) allows a number of telephones to share a single or a
small number of lines. Incoming calls to the shared line will ring all SIP devices that are sharing the
line and any one of these SIP devices can answer the call. Two different approaches to MADN
feature are supported:
• Single Call Arrangement (SCA)
• Multiple Call Arrangement (MCA)
Single Call Arrangement means, that there can only be one active call on a shared line at a time.
However, other clients that are part of the same MADN line can join the active call by going off hook.
This functionality may be restricted by privacy related configuration, actual steps differ depending on
server type. Also when one phone holds call on the MADN line, any other phone sharing this line
can pick it up. Any changes of shared line state are displayed by each phone sharing it.
Multiple Call Arrangement allows several simultaneous calls on a shared line. Incoming call makes
all devices ring, but once it's answered on one of the phones, all others go to idle state, so they can
answer/initiate new calls. No joining to active call or picking up held call on different device is
supported for this type of arrangement.
Note:
The MADN feature is only available when you connect to a call server that supports it. Different
servers support different capabilities. Your system administrator manages the MADN feature
and enables the MADN feature on your IP Deskphone if required.
Multiple Appearance Directory Number
August 2017 Avaya 1140E IP Deskphone with SIP Software User Guide 195
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