Technical data

2-3
Chapter 2: Directory Number (DN)
MBX IP Description / Operations & Programming Guide
Receiving Calls
A physical station can receive additional calls showing on DN buttons, or through other
available DN numbers that are stored in that station, even while on a call. However, if the
DN is in use, it is not possible to receive a call through that DN number.
NOTE: the status of a physical station and each DN is maintained independantly.
If the Station is idle, the normal ring will be provided. Otherwise, off-hook signaling is
activated. The Station User can answer an incoming call by pressing the flashing DN flex
button, or by going off-hook without selecting a DN flex button. If there are multiple
incoming calls at the same time, going off-hook allows the user to seize P-DN if it is
ringing, or to seize first ringing DN in the order of button number (btn 1 first, btn 2 second).
Even when there are incoming calls at a station, the User can make an outgoing call by
pressing an idle DN button and dialing the called party number.
P-DN Feature
P-DN is automatically seized first when a station user goes off-hook or dials while on-hook
when receiving or making calls. P-DN can be either M-DN or S-DN. If P-DN is not
assigned explicitly, the first DN button becomes P-DN in the order of button number.
The same DN can be used as P-DN for multiple stations. If the state of shared P-DN is
changed in this case, the status of P-DN will be updated to all the stations that have the
shared P-DN. For example, DND, call forward, and other DN-based status notifications
will be displayed at all same DN-programmed stations.
LED of DN Button
LED states of DN buttons are as follows:
• Green ON: DN being used by my station
• Red ON: DN being used by another station
• Amber flash: Held DN
• Green Flash: Ringing DN
• Red Flash: DN in DND status or DN in Call Forward
DN Tenant Group/COS
Each DN can be programmed with its own Tenant group or COS information. So, Tenant
group and COS can be different for each call depending on the DN used for the calls.
If a station has DN buttons with different tenant groups, the station can make and receive
calls using the different tenant groups.
Additionally, if the DN buttons have different COS, a station can have different COS
according to the DN button selected.
Release 1.0
November 2010