Voltage References

ISDN Voice/Data Circuits
Integrated Services Digital Network
ISDN is the revolutionary concept of converting the present
analog telephone networks to an end-to-end global digital
network. ISDN standards make possible a wide variety of
services and capabilities that are revolutionizing communications
in virtually every industry.
Motorola's ISDN product family includes: the MC145472
U-Interface Transceiver; the MC145474175 SIT-Interface
Transceivers; MC145488 Dual Data Link Controller; and the
MC68302 Integrated Multi-Protocol Processor. These are
supported by a host of related devices including: the
MC145480 +5.0 V PCM Codec-Fllter; MC145532 ADPCM
Transcoder; MC145540 ADPCM Codec; MC145500 family of
single-chip Codec/filters; MC145436 DTMF Decoder;
MC33120 Subscriber Loop Interface Circuit; MC34129
Switching Power Supply Controller; MC145611 PCM
Conference Circuit; and the MC145406/07 CMOS EIA 232-0
Driverl Receiver family.
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MOTOROLA LINEAR/INTERFACE ICs DEVICE DATA
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Motorola'S key ISDN devices fit into four ISDN network
applications: a digital subscriber line card, an NT1 network
termination, an ISDN terminal adapter, and an ISDN terminal.
Digital subscriber line cards are used in central offices, remote
concentrators, channel banks, T1 multiplexers, and other
swHching equipment. The NT1 network termination block
illustrates the Simplicity of remote U to SIT-interface
conversion. The ISDN terminal adapter and ISDN terminal
block show how Motorola ICs are used to combine voice and
data in PC compatible boards, digital telephones, and other
terminal equipment. Expanded applications such as a PBX
may include these and other Motorola ISDN circuits. Many
"non-ISDN" uses, such as pairgain applications, are
appropriate for Motorola'S ISDN devices as well.
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