peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 110

• 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

signal.
4.9.1.4
Detection
AIS is declared, when the AIS condition (the received DS2 data stream contains an all
‘1’ signal with less then 3/9 zeros within 3156 bits while the DS2 framer is out of frame)
is present within a time interval that is determined by register D2RAP.
Generation
The alarm indication signal is an all ’1’ unframed signal and will be transmitted if enabled.
4.9.1.2
Demultiplexer
The demultiplexer extracts four DS1 signals out of each DS2 signal. If two out of three
bits of C
which is assigned to the i
The demultiplexer performs inversion of the 2
Multiplexer
The multiplexer combines four DS1 signals to form a DS2 signal. Stuffing bits are
inserted and the C
in case that not enough data is available.
The 2
4.9.1.3
Detection
Loopback requests encoded in the C-bits of the DS2 signal are flagged when they are
repeated for at least five DS2 multiframes. Loops must be initiated by an external
microprocessor.
Generation
A loopback request, which is transmitted in lieu of the C-bits, can be placed in each DS2
Data Sheet
nd
i1
and 4
, C
Multiplexer/Demultiplexer
Loopback Control
Alarm Indication Signal
i2
, C
th
DS1 signal are automatically inverted in transmit direction.
i3
are set to ’1’ the first information bit in the i
i1
-, C
i2
-, C
th
DS1 signal is discarded.
i3
-bits, which are assigned to the i
110
nd
and 4
th
tributary DS1 signal.
th
subframe and the 6
th
Functional Description
DS1 signal, are set to ’1’
PEB 3456 E
05.2001
th
block