
XRT86SH221
PRELIMINARY
251
SDH-TO-PDH FRAMER/MAPPER WITH INTEGRATED 21-CHANNEL E1 SH LIU
REV. P1.0.5
BIT 7 - Receive (Ingress Direction) E1 AIS Defect Declared:
This READ/WRITE bit-field indicates whether or not the corresponding E1 signal (that is being handled by this Transmit
VT-Mapper block) is transporting the AIS indicator.
0 - Indicates that the Ingress Direction E1 signal is NOT currently transporting the AIS indicator.
1 - Indicates that the Ingress Direction E1 signal is currently transporting the AIS indicator.
BIT 6 - Receive E1 Loss of Clock Defect Declared:
This READ/WRITE bit-field indicates whether the Transmit VT-Mapper block is currently declaring the Loss of Clock
defect condition within the corresponding Ingress Direction E1 signal.
0 - Indicates that the Transmit VT-Mapper block is NOT currently declaring the Loss of Clock Defect condition with
the corresponding E1 signal.
1 - Indicates that the Transmit VT-Mapper block is currently declaring the Loss of Clock Defect condition with the
corresponding E1 signal.
BIT 5 - BIP-2 Error Insert into V5
This READ/WRITE bit-field is used to configure the corresponding Transmit VT-Mapper block to transmit erred BIP-2
bits to the remote terminal equipment. If the user invokes this feature, then the Transmit VT-Mapper block will
automatically invert the value of the locally-computed BIP-2 bits, prior to transmitting this data to the remote terminal
equipment.
0 - Configures the Transmit VT-Mapper block to NOT transmit erred BIP-2 bits to the remote terminal equipment.
1 - Configures the Transmit VT-Mapper block to transmit erred BIP-2 bits to the remote terminal equipment.
N
OTE
:
For normal operation, the user should set this bit-field to 0.
BIT [4:2] - VT Label[2:0]:
These two READ/WRITE bit-fields are used to set the VT Label bit-fields (within each outbound V5 byte) the value of
the users choice.
BIT 1 - Auto Transmit RFI-V Indicator
This READ/WRITE bit-field is used to select the source of the RFI-V bit-field, within the V5 byte of each outbound VC-
12 traffic.
0 - Configures the Transmit VT-Mapper Block to use the on-chip register as the source of the RFI-V bit-field.
1 - Configures the Transmit VT-Mapper block to set the RFI-V bit-fields to the appropriate value, based upon any
defects that the corresponding Receive VT-Mapper block is currently declaring.
T
ABLE
228: C
HANNEL
C
ONTROL
- VT-M
APPER
E1 I
NSERTION
C
ONTROL
R
EGISTER
1 (VTME1ICR1 = 0
X
ND42)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Ingress
Direction E1
AIS Defect
Declared
Ingress E1
Loss of
Clock Defect
Declared
BIP-2 Error
Insert
VT Signal Label[2:0]
Auto
Transmit
RFI-V
Indicator
Auto
Transmit
RDI-V
Indicator
R/O
R/O
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0