
XRT94L33
xr
Rev.1.2.0.
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
260
2.2.8.3.2.3
Configuring the Transmit SONET POH Processor block to automatically transmit RDI-
P, in response to declaration of the UNEQ-P Condition
The user can configure the Transmit SONET POH Processor block to automatically transmit the RDI-P
indicator, in response to the corresponding Receive SONET POH Processor block declaring the UNEQ-P
condition, by executing the following steps.
STEP 1 – Write the appropriate value into Bits 3 through 1 (UNEQ-P RDI-P Code[2:0]) within the
“Transmit SONET Path – RDI-P Condition Register – Byte 1, as illustrated below.
Transmit SONET Path – RDI-P Control Register – Byte 1 (Address = 0xN9CA)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TIM-P RDI-P Code[2:0]
Transmit
RDI-P upon
TIM-P
UNEQ-P RDI-P Code[2:0]
Transmit
RDI-P upon
UNEQ-P
R/W
0
X
0
By writing this particular value into these bit-fields the user is specifying the value that the “Transmit SONET
POH Processor” block will set the RDI-P bit-fields (within the G1 byte of outbound STS-1 frame) to whenever
the corresponding Receive SONET POH Processor block declares the UNEQ-P condition.
STEP 2 – Set Bit 0 (Transmit RDI-P upon UNEQ-P) within the “Transmit SONET Path – RDI-P Control
Register – Byte 1” to “1”, as illustrated below.
Transmit SONET Path – RDI-P Control Register – Byte 1 (Address = 0xN9CA)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TIM-P RDI-P Code[2:0]
Transmit
RDI-P upon
TIM-P
UNEQ-P RDI-P Code[2:0]
Transmit
RDI-P upon
UNEQ-P
R/W
0
X
1
This step configures the Transmit SONET POH Processor block to transmit the RDI-P indicator (per the
values written into Bits 3 through 1, within this register); anytime the corresponding “Receive SONET POH
Processor” block declares the “UNEQ-P” condition.
2.2.8.3.2.4
Configuring the Transmit SONET POH Processor block to automatically transmit RDI-
P, in response to declaration of the LOP-P Condition
The user can configure the Transmit SONET POH Processor block to automatically transmit the RDI-P
indicator, in response to the corresponding Receive SONET POH Processor block declaring the LOP-P
condition, by executing the following steps.