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( Fujitsu SRS-2100
Page 11
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.
Data Features
The voice/data version of the SRS-2100 includes the following data
capabilities:
• Communication on the D-channel using packet switching with an
asynchronous RS-232 terminal at terminal speeds up to 19,200 bits
per second
• Communication on the B-channel using circuit switching with an
asynchronous RS-232C terminal at speeds up to 38,400 bits per
second
• Communications on the B-channel using circuit switching via an RS-
232 connector for synchronous data transmission at speeds of
56,000 or 64,000 bits per second.
The supporting network data features must also be assigned to the
line.