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ordered in the Service Inbox and also whether the user is notified about received Service Indication.
The defined priority level has the following impact:
• signal-high: Notification with an SMS alert tone is presented.
• signal-medium: Notification with an SMS alert tone is presented.
• signal-low: No indication of received Service Indication is displayed to the user. The Service Indication
is silently stored in the Service Inbox.
• signal-none: Service Indication is automatically discarded. The user is not notified.
• delete: If a Service Indication already exists, the Service Indication with the same ID in the Service
Inbox is deleted. If there is no Service Indication with the same ID in the Service Inbox, the received
Service Indication is discarded. The user is not notified.
• If no attribute has been specified, Service Indications will be received as signal-medium.
5.2 Wireless Telephony Applications Interface (WTAI) Public Library
The WAP browser supports three Wireless Telephony Applications Interface (WTAI) public
library functions: making a call while browsing, sending DTMF tones, and saving numbers and
names to the phone book. These functions, MakeCall, SendDTMF, and AddPBEntry, can be used
anywhere in the WML code in the same way as when URI or script references are used for
normal non-WTAI references.
5.2.1 Making a phone call
The MakeCall function is used for making a phone call directly from the WML browser
application. A typical example of the usage of MakeCall is when the user selects an anchored
link, which initiates a phone call. When a MakeCall function is executed, the user is asked to
confirm that the dial-up is to be made. If the phone number that is about to be called does not
exist in the phone book, a confirmation query with the phone number is displayed. If the
number to be called exists in the phone book, a confirmation query is displayed with the name
fetched from the phone book. If the user accepts making the phone call, another confirmation
query is displayed with text "Quit browsing?"
If the user accepts both queries, the browser session will be terminated and the browser
application will close down. The call will then be initiated. When the call is terminated, the
phone is in idle state. If the user rejects the latter confirmation query, the call will be initiated
from within the browser display and the user can browse cached content during the call. No
in-call options such as Mute, Hold, etc., are accessible from within the browser application. The
options list belonging to the browser display remains unaffected by the fact that a call is
active.
5.2.2 Incoming call while browsing
Normal call handling applies when a call is initiated from the browser part (e.g., the called
party is busy, call barring is enabled, etc.).
5.2.3 Sending DTMF tone
The user can send DTMF tones through the network by executing a WTAI function called
SendDTMF. Just like MakeCall, a typical way of using SendDTMF is to assign the SendDTMF
function to an anchored link. The user must have a voice call active. When the DTMF tone has
WAP Service Developer's Guide for Nokia Series 30 Phones with WML Browser
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