peb2035 ETC-unknow, peb2035 Datasheet - Page 49

• Manufacturer Part Number: peb2035
• Description: Communications Advanced Cmos Frame Aligner
• Manufacturer: ETC-unknow

4
Interface to Primary Rate PCM Carriers
Receive Direction
Transmit Direction
The above signals are to be used for the connection to a Line Interface Unit (LIU) such as the
Siemens PEB 2235/PEB 2236, IPAT. Latching data on RDIP/RDIM is done on the falling edge of
RRCLK. Normally, RRCLK is extracted from the incoming data stream by the LIU. Clocking off data
at XDOP/XDOM is done on positive transitions of XRCLK with 50 % or 100 % duty cycle (selectable
via bit EMOD.XFB). To simplify different types of line interface units, the input sense of RDIP/RDIM
and the output sense of XDOP/XDOM are selectable via bits RC0. RDIS and XC0.XDOS.
Line Codes PCM 30:
Interface to Fibre Optical System
The use of the fibre optical interface is alternative to the use of the PCM carrier interface. Its
activation is performed via bit MODE.OPT, which enables reception and transmission of unipolar
uncoded data.
Receive Direction
Transmit Direction
Semiconductor Group
RDIP
RDIM
RRCLK
XDOP
XDOM
XRCLK
ROID
RDIP
RRCLK
XOID
XDOP
XRCLK
Interfaces
I
I
I
O
O
O
I
PCM 24:
I
I
O
O
I
I/O
Receive Data In Plus
Receive Data In Minus
Receive Route Clock
Transmit Data Out Plus
Transmit Data Out Minus
Transmit Route Clock
PCM 30: provided by the ACFA
PCM 24: Generated externally
HDB3
B8ZS
AMI (ZCS) (MODE.CODE = 0)
PCM 30: Receive Optical Interface Data
RDIP/RDIM are ignored.
PCM 24: Receive Data In Plus
RDIM has no function.
as above
PCM 30: Transmit Optical Interface Data
PCM 24: Transmit Data Out Plus
XDOM should be ignored.
as above
(MODE.CODE = 1)
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PEB 2035