PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 27
PEB2085
Manufacturer Part Number
PEB2085
Description
ISDN SubscribernAccess Controller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEB2085.pdf
(320 pages)
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Figure 6
Example of an ISDN
Up to eight D channel components (ICC: ISDN Communication Controller PEB 2070) may be
connected to the D and C/I (Command/Indication) channels (TIC bus). The ISAC-S and ICC
handle contention autonomously.
Data transfers between the ISAC-S and the voice/data modules are done with the help of the
IOM MONITOR channel protocol. Each V/D module can be accessed by an individual address.
The same protocol enables the control of IOM terminal modules and the allocation of
intercommunication channels inside the terminal. Two intercommunication channels IC1 and
IC2 allow a 2 64 kbit/s transfer rate between voice/data modules.
In the example above (figure 6), one ICC is used for data packets in the D channel. A voice
processor is connected to a programmable digital signal processing codec filter via IC1 and a
data encryption module to a data device via IC2. B1 is used for voice communication, B2 for
data communication.
The ISAC-S ensures full upward compatibility with IOM-1 devices. It provides the additional
strobe, clock and data lines for connecting standard combos or data devices via IOM, or serial
SLD and SSI interfaces. The strobe signals and the switching of B channels is programmable.
Figure 7 shows the implementation of a basic ISDN feature telephone using the ISAC-S and
the Audio Ringing Codec Filter featuring speakerphone (ARCOFI
Semiconductor Group
PEB 2085
PEB 2086
ISAC -S
µ
C
R
D,
C/I
®
Data Module
PEB 2070
-S Voice/Data Terminal
ICC
B1
Processing
Speech
Speech Modules
IOM -2
27
IC1
R
DSP-COFI
B2
Encryption
®
-SP: PSB 2165).
Data
Data Modules
IC2
SAB 8252X
HSCX
Features
ITD02316
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