tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 23

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

May 2001
3 Pin Information
Table 10. M13 Multiplexer/Demultiplexer Receive Section (continued)
3.3.8 Low-Order Path Overhead Access Channel
Each VT has a low-order path overhead, and this interface allows access to all LOPOH bits for all VTs. Note that
the purpose of doing this is slightly different form the transport and path overhead access. These are used to cross
couple the bits between links in a protection scheme, rather than provide access for examination or modification of
the overhead, although that is possible too.
Table 11. Low-Order Path Overhead Access Channel
Agere Systems Inc.
H22
E17
E15
E19
Pin
AC13
AC14
AB14
AB15
AB17
AB18
Pin
RCBDATA
RDLDATA
RCBCLK
RDLCLK
Symbol
LOPOHVALIDOUT
LOPOHDATAOUT
LOPOHCLKOUT
LOPOHVALIDIN
LOPOHDATAIN
LOPOHCLKIN
Symbol
(continued)
Type
—
—
—
—
VT MAPPER
Figure 4. DS1/E1 to DXC Block Diagram
I/O
O
O
O
O
OUTPUTS
INPUTS
LOPOH
LOPOH
Type
—
—
—
—
—
—
Receive C-Bit Clock. A gapped clock (nominally 93.983 kHz) for out-
putting selected C-bits on RCD.
Receive C-Bit Data. The received network requirements bit (C2) and
the received unused C-bits (C4, C5, C6, C16, C17, C18, C19, C20,
and C21) are output after they are demultiplexed from the received
DS3 signal.
Receive Data Link Clock. A gapped clock (nominally 28.195 kHz)
for outputting path maintenance data link C-bits on RDLD.
Receive Data Link Data. The received path maintenance data link
C-bits (C13, C14, and C15) that are demultiplexed from the received
DS3 signal.
Transmit Direction
Receive Direction
I Pull down
I Pull down Low-Order Path Overhead Data. (O-bits, V5, J2,
I Pull down
DS1/E1 TO DXC
TELECOM BUS
I/O
O
O
O
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Z6/N2, Z7, and K4 byte.)
6.48 MHz Low Order Path Overhead Clock.
Low-Order Path Overhead Data. (O-bits,V5, J2,
Z6/N2, Z7/K4 byte.)
Valid VTMPR_LOPOH_DATA Output.
6.48 MHz Low Order Path Overhead Clock.
Valid LOPOH_DATA.
LOPOH
OUTPUTS
LOPOH
INPUTS
VT MAPPER
Description
Description
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