PEF2054 SIEMENS [Siemens Semiconductor Group], PEF2054 Datasheet - Page 228
![no-image](/images/no-image-200.jpg)
PEF2054
Manufacturer Part Number
PEF2054
Description
ICs for Communications
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEF2054.pdf
(269 pages)
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The line card consists of an EPIC (PEB 20550) device which handles the monitor and
the signaling channels of up to 16 SICOFI-4 (PEB 2465) devices. Since each SICOFI-4
supports four analog lines, up to 64 analog subscriber lines (t/r lines) can be
accommodated.
Figure 79 shows the interconnection of the EPIC, and the SICOFI-4 devices via the
IOM-2 interface:
Figure 79
Analog Line Card with SICOFI
A typical timing example for the connection of the line card to a 2.048 Mbit/s PCM
backplane is shown in figure 80. It should be noted that the PCM interface must be
5.9
5.9.1
clocked with a 4.096 MHz clock even if the PCM interface operates at only 2.048 Mbit/s.
This is to obtain a DCL output frequency of 4.096 MHz, which is required for the IOM-2
timing.
Semiconductor Group
Analog
Lines
Analog
Lines
Quadruple Codec Filter
Quadruple Codec Filter
Up to 4 Devices per
IOM -2 Port
Applications
Analog IOM
SICOFI -4
SICOFI -4
R
R
R
D
D
OUT
OUT
DCL
DCL
FSC
FSC
D
D
®
IN
IN
-2 Line Card with SICOFI
®
-4 Devices Using the IOM
2048 kbit/s
2048 kbit/s
4096 kHz
8 kHz
k 1
+5V
4 x
228
IOM -2 Ports
R
+5V
1 k
®
-4 as Codec/Filter Device
DCL
FSC
DD0
DU0
DD1
DU1
DD2
DU2
DD3
DU3
P
EPIC
®
-2 Interface
R
HSCX
RxD0
RxD1
RxD2
RxD3
TxD0
TxD1
TxD3
TxD2
PDC
PFS
Application Hints
4096 kHz
8 kHz
PCM
Backplane
4096 kbit/s
2048 kbit/s or
Signaling
High
Backplane
PEB 2055
PEF 2055
ITS09552
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