pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 195

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

PEB 20550
PEF 20550
Application Hints
In contrast to other Siemens telecom devices, the ELIC does not provide an ‘IOM mode’
or an ‘SLD mode’ that can be selected by programming a single ‘mode bit’. Instead, the
ELIC provides a configurable interface (CFI) that can be configured for a great variety of
interfaces, including IOM-1, multiplexed IOM-1, IOM-2 and SLD interfaces.
The Characteristics of the Different IOM
®
and SLD Interfaces can be Divided into
Two Groups
• Timing characteristics and
• Handling of special channels (C/I or signaling channel, monitor or feature control
channel)
The timing characteristics (data rate, clock rate, bit timing, etc. … ) are programmed in
the CFI registers (see chapter 5.2.2.2). The CFI data rate, for example, can be selected
between 128 kBit/s and 8192 kBit/s. This covers the standard IOM and SLD data rates
of 256, 512, 768 and 2048 kBit/s.
The special channels are initialized on a per timeslot basis in the control memory (CM).
This programming on a per timeslot basis allows a dedicated usage of each CFI port and
timeslot: an application that requires only two IOM-2 compatible layer-1 transceivers will
also only occupy 8 CFI timeslots (2 IOM channels) for that purpose. The remaining 24
timeslots can then be used for general switching applications or for the connection of non
IOM-2 compatible devices that require a special P handling.
The Special Channels can be Divided into Two Groups
• Monitor/Feature Control channels and
• Control/Signaling channels
Semiconductor Group
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