pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 24

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

1.4
The IWE8 type PXB4219 does only support the ATM mode used for ITU-T G.804
compliant ATM cell mapping into the plesiochronous digital hierarchy (PDH) at line rates
of 1544 kbit/s and 2048 kbit/s. The AAL mode is not available.
1.5
The IWE8 type PXB4220 uses an internal clock recovery mechanism (SRTS) which is
patented by Bellcore.
Related Patents are:
• Bellcore patent No. 5,260,978
• Bellcore patent No. 4,839,306
Infineon Technologies is not allowed to collect SRTS license fees on the IWE8 on behalf
of Bellcore. Contacts for license issues are given in
Every IWE8 customer must get in contact with Bellcore legal department by himself to
clarify whether his application needs to license the SRTS functionality.
For customers who do not want to use the built-in SRTS mechanism, Infineon provides
a special version of the IWE8. The name of this device is PXB4221 and covers the same
functionality (pin and register compatible) like the PXB4220. SRTS is physically and
permanently disabled, so that no patent fees have to be paid.
Data Sheet
(Synchronous Residual Time Stamp for Timing Recovery in a broadband network)
(Method and apparatus for multiplexing circuit and packet traffic)
Differences Between PXB4220 And PXB4219
Differences Between PXB4220 And PXB4221
24
PXB4219 / PXB4220 / PXB4221
Chapter
13.
2002-05-06
Overview