SXT6051 STM-1/0 SDH Overhead Terminator
Table 2: Signal Description (Sheet 3 of 11)
Pin #
Name
TSOHFR
Type
Description
17
O
Transmit RSOH and MSOH Serial Access Frame Position.
This is an 8 KHz synchronization pulse indicating the start
(MSB of A1) of the 72 bytes of STM-1 RSOH/MSOH or 24
bytes of STM-0 RSOH/MSOH input at TSOH. It is synchro-
nous with MMSPPCKO.
HiZ-4ma
137
RSOH
O
Receive RSOH and MSOH Serial Access. Serial output of
received RSOH and MSOH data. The data is clocked out syn-
chronous to DMSPPCKO at 19.44 MHz for STM-1 and 6.48
MHz for STM-0.
HiZ-4ma
136
135
RSOHEN
RSOHFR
O
Receive RSOH and MSOH Serial Access Clock Enable.
Used to enable clocking of RSOH and MSOH data at the
RSOH output using DMSPPCKO.
HiZ-4ma
O
Receive RSOH and MSOH Serial Access Frame Position.
This is an 8 KHz synchronization pulse indicating the start
(MSB of A1) of the 72 bytes of STM-1 RSOH/MSOH or 24
bytes of STM-0 RSOH/MSOH output at RSOH. It is synchro-
nous with DMSPPCKO.
HiZ-4ma
28
29
31
30
TPOH
I
Transmit HPOH Serial Access. Input for serially sourced
HPOH transmit data.
TTLin
TPOHCK
TPOHEN
TPOHFR
O
Transmit HPOH Serial Access Clock. Used to clock in the
TPOH data at 19.44 clock for STM-1 or 6.48 MHz for STM-0.
HiZ-4ma
O
Transmit HPOH Serial Access Clock Enable. Used to enable
TPOHCK clocking of TPOH input data.
HiZ-4ma
O
Transmit HPOH Serial Access Frame Position. This is an 8
KHz synchronization pulse indicating the start (MSB of J1) of
the 9 bytes of HPOH input at TPOH. It is synchronous with
TPOHCK.
HiZ-4ma
122
121
119
120
RPOH
O
Receive HPOH Serial Access. Serial output of received
HPOH data.
HiZ-4ma
RPOHCK
RPOHEN
RPOHFR
O
Receive HPOH Serial Access Clock. Used to clock out the
RPOH data at 19.44 clock for STM-1 or 6.48 MHz for STM-0.
HiZ-4ma
O
Receive HPOH Serial Access Clock Enable. Used to enable
RPOHCK clocking of received RPOH data.
HiZ-4ma
O
Receive HPOH Serial Access Frame Position. This is an 8
KHz synchronization pulse indicating the start (MSB of J1) of
the 9 bytes of HPOH input at RPOH. It is synchronous with
RPOHCK.
HiZ-4ma
177
124
B1OUT
B2OUT
O
B1 Error Output (BIP). This pin goes High when an error is
detected by the regenerator section overhead. It is synchronous
to DMSPPCK0.
HiZ-2ma
O
B2 Error Output (BIP) This pin goes High when an error is
detected by the terminal section overhead. It is synchronous to
DMSPPCK0
HiZ-2ma
10
LevelOne [ LEVEL ONE ]
