
XRT86SH328
PRELIMINARY
324
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
N
OTE
:
The user must also set Bit 0 (Auto Transmit AIS-V Enable) within the "Channel Control - VT-De-Mapper Block -
Egress Direction - Receive VT Auto AIS Control" Register to "1" in order to configure the VT-De-Mapper block to
automatically transmit the AIS-V indicator, in response to this defect condition.
Bits 5 - 1 - Reserved:
Please set each of these bit-fields to "0" for normal operation.
Bit 0 - Auto Transmit AIS-V Enable
This READ/WRITE bit-field permits the user to configure the VT-De-Mapper block to automatically transmit the AIS-V
indicator (via the down-stream traffic) whenever (and for the duration that) it declares either the AIS-V, LOP-V, TIM-V,
UNEQ-V, PLM-V or "VT Path Trace Message Unstable" defect conditions.
`
0 - Configures the VT-De-Mapper block to NOT automatically transmit the AIS-V indicator (via the "downstream
traffic) upon declaration of any of the "above-mentioned" defect conditions.
`
1 - Configures the VT-De-Mapper block to automatically transmit the AIS-V indicator (via the "downstream traffic)
upon declaration of any of the "above-mentioned" defect conditions.
N
OTE
:
The user must also set the corresponding bit-fields (within this register) to "1" in order to configure the VT-De-
Mapper block to automatically transmit the AIS-V indicator upon detection of a given alarm/defect condition.
Bits 7 - 0 - Transmit J2 Byte Value[7:0]:
These READ/WRITE bit-fields permit the user to have software control over the value of the J2 byte, within the outbound
VT data-stream.
If the user configures the VT-Mapper block to use this register as the source of the J2 byte, then it will automatically
write the contents of this register into the J2 byte location, within each "outbound" VT multi-frame.
This feature is enabled whenever the user writes the value "[1, 0]" into Bits 1 and 0 (Transmit VT-Path Trace Message
Source[1:0]) within the "Channel Control - VT Mapper Block - Ingress Direction - VT Path Trace Message Control"
Register.
Bits 7 - 0 - Transmit N2 Byte Value[7:0]:
These READ/WRITE bit-fields permit the user to have software control over the value of the N2 byte, within the
outbound VT data-stream.
The VT-Mapper block will (unconditionally) use this register as the source of the N2 byte, then it will
automatically write the contents of this register into the J2 byte location, within each "outbound" VT multi-
frame.
T
ABLE
461: C
HANNEL
C
ONTROL
- VT-M
APPER
B
LOCK
- I
NGRESS
D
IRECTION
- T
RANSMIT
J2 B
YTE
V
ALUE
R
EGISTER
(A
DDRESS
= 0
X
ND76,
WHERE
N
RANGES
IN
VALUE
FROM
0
X
01
TO
0
X
1C)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Transmit J2 Byte Value[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
T
ABLE
462: C
HANNEL
C
ONTROL
- VT-M
APPER
B
LOCK
- I
NGRESS
D
IRECTION
- T
RANSMIT
N2 B
YTE
V
ALUE
R
EGISTER
(A
DDRESS
= 0
X
ND77,
WHERE
N
RANGES
IN
VALUE
FROM
0
X
01
TO
0
X
1C)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
Transmit N2 Byte Value[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0