peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 111

• Manufacturer Part Number: peb3456
• Description: Channelized T3 Termination With Ds3 Framer, M13 Multiplexer, T1/ E1 Framers And 256 Channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

4.9.2
The multiplexing frame structure is shown in Table 4-12.
Table 4-12
4.9.2.1
The integrated framer searches for the frame alignment pattern ’111010000’ in each of
the seven frames which are contained in a DS3 signal. Frame alignment is declared,
when the framer has found three consecutive correct frame alignment signals. If the
frame alignment signal has been received incorrectly in one of the following frames after
the receiver found the first correct frame alignment signal a new search is started.
Loss of frame is declared, when four consecutive frame alignment signals have been
received incorrectly.
4.9.2.2
Demultiplexer
The demultiplexer extracts three E1 signals from each 6.312 MHz signal. If two out of
three bits of C
discarded.
Data Sheet
Frame
G.747
ITU-T
ITU-T G.747 format
Synchronization Procedure
Multiplexer/Demultiplexer
ITU-T G.747 format
j1
Set
, C
IV
III
V
II
I
j2
, C
j3
Frame Alignment Signal 111010000
Bits from tributaries
Alarm indication to the remote multiplex
equipment
Parity Bit
Reserved
Bits from tributaries
Justification control bits C
Bits from tributaries
Justification control bits C
Bits from tributaries
Justification control bits C
Bits from tributaries available for justification
Bits from tributaries
are set to ’1’ the available justification bit of the j
111
Content
j1
j2
j3
Functional Description
PEB 3456 E
th
10 to 168
E1 signal is
4 to 168
4 to 168
4 to 168
7 to 168
1 to 9
1 to 3
1 to 3
1 to 3
4 to 6
Bit
1
2
3
05.2001