User guide

Additional features
202
Multiple Appearance Directory Number
Multiple Appearance Directory Number (MADN), also known as Bridge
Line Appearance, and using Single Call Appearance (SCA) allows
multiple phones to appear as a single line to the caller. Any of the IP
Phones with an active MADN feature can initiate or answer a call, but only
one call can be active at a time. However, other clients that are part of the
same MADN line can join the active call by going off hook.
You can prevent others from joining the call by using the MADN feature to
make the call private. To make the call private you dial a special code
(Vertical Service Code) so that the call server knows that the call is
private. To dial a Vertical Service Code on an IP Phone 1120E, you must
first initiate a new call by pressing the Action Context-sensitive soft key
and select New Call/Conference, and then dial the Vertical Service Code
that is provided by your system administrator or service provider.
Attention: The MADN feature is only available when you connect to
a call server that supports it. Your system administrator manages the
MADN feature and enables the MADN feature on your
IP Phone 1120E if required.
When multiple phones are configured with a MADN SCA feature, they
share one single Directory Number (DN) that is available to the user. An
incoming call to this DN or to any SIP address of the users of the MADN
SCA group causes all the phones to ring. Also, any user of the MADN
SCA group can join a call initiated from any of the phones of that group.
Any user that joins a call with the MADN SCA feature can put the call on
hold and prevent other users within the MADN SCA group from joining.