SXT6051 STM-1/0 SDH Overhead Terminator
Figure 4: STM-1 Terminal Multiplexer
SETS Local Reference 19.44 MHz
Transmit
Reference
21 E1 card TUG#3
SXT 6251
SXT 6051
OHT
TX
Data
Clock
Telecom Bus Timing
Mapper
TX
Transmit Data and Clock E1 <1:21>
Telecom Bus Data
MSOH:
E1 Line
Interface
units
STM-1
LIU
RAP
M1 REI,
K2 RDI
HPOH:
G1 REI,
G1 RDI
TX/RX STM-0
SXT 6251
Mapper
RX
REI, RDI
Alarm Status
Telecom Bus Data
Telecom Bus Timing
SXT 6051
OHT
Data
SAP
Clock
LOS
RX
Receive data and Clock E1 <1:21>
Transmit Data and Clock E1 <1:21>
SXT 6251
Mapper
TX
RAP
E1 Line
Interface
units
STANDARD Terminal
STM-1 configuration
without Receive retiming
SXT 6251
Mapper
RX
REI, RDI
Alarm Status
SAP
Receive data and Clock E1 <1:21>
21 E1 Card Tug#2
SXT 6251
Mapper
TX
Transmit Data and Clock E1 <1:21>
RAP
E1 Line
Interface
units
SXT 6251
Mapper
RX
REI, RDI
Alarm Status
SAP
Receive data and Clock E1 <1:21>
21 E1 Card Tug#1
24
LevelOne [ LEVEL ONE ]
