Nortel BCM 3.7, Manual

Page: 377 / 1004

Defining the System DN headings 377
Programming Operations Guide
Moving between the Inactive and Active lists
DNs move between active and inactive lists based on a number of factors which are described in
the two sections below.
From Active list to the Inactive list
A DN record heading will move from the Active list to the Inactive list in the following
circumstances:
• A digital or analog hard-wired telephone (M-series or T-series telephones) remains unplugged
from a port for more than two minutes.
• An IP telephone is disconnected from the system for more than 30 seconds and the Keep DN
alive setting for that telephone is set to No . If Keep DN alive is set to Yes for the telephone, that
DN remains active until the field is set to No, or the system administrator removes the DN.
• An application such as voice-mail, IVR, or the Unified Manager no longer requires DN(s) and
stops communicating on them.
• In the case of a registered DN, if the device or service is turned off.
From Inactive list to Active list
A DN will move from the Inactive list to the Active list in the following circumstances:
• A digital telephone (M-series or T-series) is plugged into the port assigned to the DN.
• An IP telephone (2001, 2002, 2004, 2050) registers to the system and gets assigned a requested
or automatically-selected DN. IP telephones also assign to one of the IP keycoded positions,
which is indicated in the Device port field.
• An application such as voice-mail, IVR, or the Unified Manager allocates and starts using
DN(s)
• In the case of a registered device, if the device or service is started or turned on.
Deregistering IP telephones
If you select the DN for an IP telephone, which is listed under Active DNs reg’d , Inactive DNs
reg’d , All DNs reg’d , IP set DNs reg’d , or IP wireless DN’s reg’d you can deregister that device
using the Deregister heading under Configuration on the top menu. In this case the record will
return to the DNs available for reg’n list.
• If you run Deregister on an active device, you will be prompted to confirm that you understand
that the device will be terminated. If you click OK , the device is deregistered immediately.
• If you run Deregister on an inactive device, there will be no prompts, and the action will occur
immediately.