peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 79
peb2256
Manufacturer Part Number
peb2256
Description
E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB2256.pdf
(490 pages)
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4.2
4.2.1
Bit: FMR1.PMOD = 0
PCM line bit rate
Single frame length
Framing frequency
HDLC controller
Organization
The operating mode of the FALC56 is selected by programming the carrier data rate and
characteristics, line code, multiframe structure, and signaling scheme.
The FALC56 implements all of the standard framing structures for E1 or PCM 30 (CEPT,
2.048 Mbit/s) carriers. The internal HDLC or CAS controller supports all signaling
procedures including signaling frame synchronization/synthesis and signaling alarm
detection in all framing formats. The time slot assignment from the PCM line to the
system highway and vice versa is performed without any changes of numbering (TS0 ↔
TS0, …, TS31 ↔ TS31).
Summary of E1 Framing Modes
• Doubleframe format according to ITU-T G. 704
• Multiframe format according to ITU-T G. 704
• CRC4 processing according to ITU-T G. 706
• Multiframe format with CRC4 to non CRC4 interworking according to ITU-T G. 706
• Multiframe format with modified CRC4 to non CRC4 interworking
• Multiframe format with CRC4 performance monitoring
After reset, the FALC56 is switched into doubleframe format automatically. Switching
between the framing formats is done by programming bits FMR2.RFS1/0 and
FMR3.EXTIW for the receiver and FMR1.XFS for the transmitter.
Data Sheet
Framer Operating Modes (E1)
General
:
:
:
:
:
2.048 Mbit/s
256 bit, No. 1…256
8 kHz
nx64 kbit/s, n = 1 to 32 or n × 4 kbit/s, n = 1 to 5
32 time slots, No. 0…31
with 8 bits each, No. 1…8
79
Functional Description E1
FALC56 V1.2
PEB 2256
2002-08-27
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