
PRELIMINARY
XRT86SH221
182
REV. P1.0.5
SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU
incoming STM-0 data-stream.
0 - Does not configure the Receive STM-0 POH Processor block to automatically transmit the AIS-P indicator (via the
downstream traffic) whenever it declares the Path Trace Message Unstable defect condition.
1 - Configures the Receive STM-0 POH Processor block to automatically transmit the AIS-P indicator (via the
downstream traffic) whenever it declares the Path Trace Message Unstable defect condition.
N
OTE
:
The user must also set BIT 0 (Transmit AIS-P Enable) to 1 to configure the Receive STM-0 POH Processor
block to automatically transmit the AIS-P indicator, in response to this defect condition.
BIT 2 - Transmit Path AIS (Downstream) upon declaration of the TIM-P (Path Trace Message Identification
Mismatch) defect condition
This READ/WRITE bit-field is used to configure the Receive STM-0 POH Processor block to automatically transmit a
Path AIS (AIS-P) Indicator via the downstream traffic (e.g., towards each of the 28 Egress Direction Transmit E1 Framer
blocks), anytime (and for the duration that) it declares the TIM-P defect condition within the incoming STM-0 data-
stream.
0 - Does not configure the Receive STM-0 POH Processor block to transmit the AIS-P indicator (via the downstream
traffic) whenever it declares the TIM-P defect condition.
1 - Configures the Receive STM-0 POH Processor block to transmit the AIS-P indicator (via the downstream traffic)
whenever it declares the TIM-P defect condition.
N
OTE
:
The user must also set BIT 0 (Transmit AIS-P Enable) to 1 to configure the Receive STM-0 POH Processor
block to automatically transmit the AIS-P indicator, in response to this defect condition.
BIT 1 - Transmit Path AIS (Downstream) upon Detection of Loss of Pointer (LOP-P) Defect Condition
This READ/WRITE bit-field is used to configure the Receive STM-0 POH Processor block to automatically transmit the
Path AIS (AIS-P) Indicator via the downstream traffic (e.g., towards each of the 28 Egress Direction Transmit E1 Framer
blocks), anytime (and for the duration that) it declares the LOP-P defect condition within the incoming STM-0 data-
stream.
0 - Does not configure the Receive STM-0 POH Processor block to automatically transmit the AIS-P indicator (via the
downstream traffic, towards the corresponding Transmit SDH POH Processor block) whenever it declares the LOP-P
defect condition.
1 - Configures the Receive STM-0 POH Processor block to automatically transmit the AIS-P indicator (via the
downstream traffic, towards the corresponding Transmit SDH POH Processor block) whenever it declares the LOP-P
defect condition.
N
OTE
:
The user must also set BIT 0 (Transmit AIS-P Enable) to 1 to configure the Receive STM-0 POH Processor
block to automatically transmit the AIS-P indicator, in response to this defect condition.
BIT 0 - Automatic Transmission of AIS-P Enable
This READ/WRITE bit-field serves two purposes.
It is used to configure the Receive STM-0 POH Processor block to automatically transmit the Path AIS
indicator, via the down-stream traffic (e.g., towards each of the 28 Egress Direction Transmit E1 Framer
blocks), upon detection of an UNEQ-P, PLM-P, LOP-P or LOS conditions.
It also is used to configure the Receive STM-0 POH Processor block to automatically transmit a Path (AIS-P)
Indicator via the downstream traffic (e.g., towards each of the 28 Egress Direction Transmit E1 Framer
blocks) anytime it detects an AIS-P condition in the incoming STM-0 data-stream.
0 - Configures the Receive STM-0 POH Processor block to NOT automatically transmit the AIS-P indicator (via the
downstream traffic, towards each of the 28 Egress Direction Transmit E1 Framer blocks) whenever it declares any of
the above-mentioned defect conditions.
1 - Configures the Receive STM-0 POH Processor block to automatically transmit the AIS-P indicator (via the
downstream traffic, towards each of the 28 Egress Direction Transmit E1 Framer blocks) whenever it declares any of
the above-mentioned defect condition.
N
OTE
:
The user must also set the corresponding bit-fields (within this register) to 1 in order to configure the Receive
STM-0 POH Processor block to automatically transmit the AIS-P indicator upon detection of a given alarm/
defect condition.