peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 54

• 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

CHATT in transmit direction, mirrored to the respective receiver and stored in system
receive clock, each receiver looped uses the corresponding transmit clock.
•
Figure 4-2
4.1.2
DS3 line loopback mode the incoming DS3 signal is mirrored and placed on the DS3
signal output. While operating in DS3 line loopback mode, the incoming receive clock
RCLK is used to update outgoing transmit data. In DS2 line loopback mode one
arbitrarily selectable DS2 signals is looped in the M12 stage of the TE3-CHATT. The T1/
E1 line loopback mode mirrors one or more incoming lines. Transmit data coming from
the transmit data path is replaced with the mirrored data stream.
4.1.1
Local port loops are provided on DS3, DS2 and DS1 level on a per port/tributary basis.
In the local loop the outgoing bit stream of a port/tributary is mirrored to the receive data
path. This allows to prepare data in system memory, which is processed by the TE3-
memory again. In order to ensure that the local port loop works even without incoming
The TE3-CHATT supports remote line loops in different stages of the M13 data path. In
Data Sheet
RD44N
RD44P
RD44N
TC44O
TD44N
RD44P
TC44O
TD44P
TD44N
TD44P
RC44
RC44
TC44
TC44
Local Port Loop
Remote Line Loops
Local Port Loops in M13 mode
Transmit
Transmit
Receive
Framer
Receive
Framer
Framer
Framer
DS3
DS3
DS3
DS3
Multiplexer
Multiplexer
Demux
Demux
M23
M23
M23
M23
54
Transmit
Transmit
Receive
Receive
Framer
Framer
Framer
Framer
DS2
DS2
DS2
DS2
Multiplexer
Multiplexer
Demux
Demux
DS2
DS2
DS2
DS2
Functional Description
Transmit
Transmit
Receive
Receive
Framer
Framer
Framer
Framer
T1/E1
T1/E1
T1/E1
T1/E1
PEB 3456 E
Protocol
Protocol
Protocol
Protocol
05.2001
Data
Data
Data
Data