Fujitsu SRS-1050, User Manual, Page: 13 / 140

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Fujitsu SRS -1050
Page 11
Onhook dialing. You can dial a number before you get a dial tone.
The number you dial appears on the display and remains there for
three minutes. When you lift the handset and press an idle Call
Appearance button, or press the SPEAKER button for handsfree
mode, the phone initiates the call automatically.
ISDN CONCEPTS: INTEGRATED VOICE AND DATA
ISDN stands for Integrated Services Digital Network, which provides
many voice and communication features. (The SRS-1050 data
features, available with the data model, are described in Chapter 4,
"Data Operation".)
The basic ISDN service provides two 64,000 bits per second "B"
channels for voice or data communications. Each B-channel can
support circuit-switched or packet-switched data services. There is
also one "D" channel, at 16,000 bits per second, for network
signaling and packet-switched data service. The combination is
often referred to as "2B+D", or the Basic Rate Interface (BRI).
Voice Features
The voice features of an ISDN telephone have several advantages:
•
They allow your telephone to handle multiple calls
simultaneously, receiving calls while keeping others on hold.
•
They also permit a call coming in to a single directory number
to ring more than one physical telephone. This feature
facilitates call handling within a group.
•
They provide easy-to-use-access to powerful features such as
call conferencing and call transfer, to enhance your productivity.
•
They allow the incoming directory number to be displayed if it is
available.