pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 38

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

1.6.4
1.6.4.1 Adaptation of a DECT System to an Existing PBX
When adding a DECT system to an existing PBX, the line interface of the DECT system
must provide the PBX with PCM-coded voice data.
Depending on the DECT controller the voice information is carried in different formats
(4 bit ADPCM or 8 bit PCM ).
Therefore a base station offering 8 bit PCM coded data can be connected directly to any
PBX, whereas a base station delivering 4 bit ADPCM coded data needs an ADPCM to
PCM converter. Such an adapter is called Common Control Fixed Part (CCFP).
An example for a CCFP realized with the ELIC (serving up to 32 handhelds in operation
at a time) is given in the figure 21.
Figure 21
DECT Application
Semiconductor Group
1
DECT Applications
Base Stations
2
3
U
PN
4
SICOFI -4
SICOFI -4
38
OCTAT -P
R
R
R
IOM -2
IOM -2
IOM -2
R
R
R
SYNC
HDLC
D
ADPCM
ELIC
PCM
C µ
HDLC
R
QUAD
ADPCM
QUAD
ADPCM
DSP
SLIC
SLIC
PEB 20550
PEF 20550
CCFP
ITS07314
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