pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 23

• Manufacturer Part Number: pxb4219
• Description: Iwe8 Interworking Element For 8 E1/t1 Lines
• Manufacturer: Infineon Technologies Corporation

Figure 4
The echo cancelling function itself is performed in STM. In the application above the
IWE8 is used to translate voice ATM channels into STM channels and vice versa.
Infineon’s Smart Integrated Digital Echo Canceller (SIDEC, PEB 20954) is used for
cancellation of the echo that is generated by reflection on the near end side and heard
by the far end speaker. The SIDEC can cancel end echo paths (SDH or PDH network
on near end side) up to 128 ms. For details see [21]
Data Sheet
Near End
network
PDH
Echo Canceller Application
FALC LH
PEB2255
PEB20954
SIDEC
IWU
23
PXB4219 / PXB4220 / PXB4221
PXB4220
IWE8
network
Far End
ATM
2002-05-06
Overview