NEC XN120 Feature Manual page 131

Multiple Directory Numbers / Call Coverage
n Description
Multiple Directory Numbers let a system phone have more than one extension number. Calls can route
to the system phone's installed number or to the system phone's "virtual extension" Multiple Directory
Number key. This helps users identify incoming calls. For example, an extension installed at 304
(Sales) could have a virtual extension for 460 (Service). Calls to 304 ring the extension normally. Calls
to 460 ring the Multiple Directory Number key. This lets the user at extension 304 differentiate Sales
calls from Service calls.
Call Coverage
A system phone can have Multiple Directory Number keys set up as Call Coverage keys for
co-worker's extensions. The Call Coverage key lights when the co-worker's extension is busy and
flashes slowly when the co-worker has an incoming call. The Call Coverage key can ring immediately
when a call comes into the covered extension, ring after a delay or not ring at all. In addition, the
system phone user can press the Call Coverage key to intercept their co-worker's incoming call. The
user can also go off hook and press the Call Coverage key to call the covered extension.
If the covered extension is busy and they receive a second call, the covering extension's Call Coverage
key will flash. The user just presses the flashing key to pick up the call.
The Call Coverage keys follow the extension's Do Not Disturb and Off-Hook Signaling programming.
These keys do not, however, indicate the lamping for extensions in DND. If this is required, a Hotline
key can be used instead.
Place and Receive Calls on Call Coverage/Multiple Directory Number Keys
Multiple Directory Number keys/Call Coverage keys can be used three separate ways, depending on
how the key is defined in Program 15-02-21.
·
a DSS key to the extension and for receiving incoming calls
·
answering incoming calls with the ability to place outgoing ICM or CO calls
·
just for receiving incoming calls
A system phone can have Multiple Directory Number/Call Coverage keys for many different
extensions and virtual extensions. In addition, co-workers can share the same Multiple Directory
Numbers. For example, everyone in the Service Department could have a key for the Sales
Department's virtual extension.
Auto Off-Hook Answer and Ringing Line Preference for Call Coverage Keys
An extension's Call Coverage Keys can be programmed to allow the user to simply pick up the handset
to answer a ringing call. So as not to interfere with ringing trunk or Intercom calls, the system
automatically assigns Call Coverage Key ringing with the lowest answering priority. If multiple Call
Coverage Keys are ringing, answering priority is set first by the assigned ring pattern and then by the
key position.
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