You want an IP phone to use a line prompt instead of an MWI lamp to display information about a new
message.
Which of the following line appearance fields should you modify in UCM?
A.
Display
B.
External Phone Number Mask
C.
Line Text Label
D.
Visual Message Waiting Indicator Policy
Explanation:
You should modify the Visual Message Waiting Indicator Policy field in the Cisco Unified Communications
Manager (UCM) administrative graphical user interface (GUI). The Visual Message Waiting Indicator Policy
field configures the behavior of the message waiting indicator (MWI) lamp and of the MWI line prompt on an IP
phone. For example, configuring the Visual Message Waiting Indicator Policy field to Light and Prompt will
configure the IP phone to turn on the MWI lamp that is located on the IP phone’s handset when a new voice
mail message arrives. In addition, the IP phone will display a new message prompt beside the associated line
button on the IP phone. However, configuring the Visual Message Waiting Indicator Policy field to Prompt Only
will display the new message prompt beside the line button but will not turn on the MWI lamp. You can
configure the Visual Message Waiting Indicator Policy field differently for each line that is associated with the IP
phone. For example, if the IP phone is configured with a shared line in addition to a primary line, you could
configure the Visual Message Waiting Indicator Policy field for the shared line to None so that the IP phone
never displays MWI information for the shared line.
You should not modify the Line Text Label line appearance field. The contents of the Line Text Label field are
displayed beside the associated line button of an IP phone. The field is typically configured with the name of the
user that is associated with the line. If the Line Text Label field is not configured, the directory number (dn) that
is associated with the line will be displayed instead. For example, if user John Public has been assigned
extension 4000, the dn 4000 will be displayed beside the associated line button on the main screen of John
Public’s IP phone unless you configure the Line Text Label field. If you configure the Line Text Label field with
the name John Public, then that name will appear beside the line button on the main screen of the IP phone.
You should not modify the Display (Internal Caller ID) field. When the Display (Internal Caller ID) field is blank,
the dn that is associated with the calling device is shown on the display of the called device. Otherwise, the
contents of the Display (Internal Caller ID) field are shown on the display of the called device. You can configure
the Display (Internal Caller ID) field with a name or a description of up to 30 characters in length. If you
configure the Display (Internal Caller ID) field, you should also configure the ASCII Display (Internal Caller ID)
field with similar information. The contents of the ASCII Display (Internal Caller ID) field are displayed on called
devices that do not support Unicode character sets. You cannot use nonASCII characters in the ASCII Display
(Internal Caller ID) field.
You should not modify the External Phone Number Mask field. UCM transmits the contents of the External
Phone Number Mask field as caller ID information when an internal user places an outgoing call to an external
party. The information in the External Phone Number Mask field can be a string that consists of up to 24
numbers, the international escape character +, and X wildcards that represent the extension number. The X
wildcards should always be at the end of the string. For example, a user that has been assigned extension
number 4000 on the internal Voice over IP (VoIP) network might also be assigned a direct inward dial (DID)
number of (555) 5554000. Therefore, you could configure the External Phone Number Maskfield with the string
555555XXXX. The number 5555554000 would then be displayed on the caller ID systems of any external
parties who are called by the user at extension 4000. If the user at extension 4000 was not assigned a DID
number, you could configure the External Phone Number Mask field with your company’s main public switched
telephone network (PSTN) number instead.Cisco: Directory Number Configuration: Directory Number Configuration Settings