
XRT86SH328
PRELIMINARY
184
28-CHANNEL DS1/E1 FRAMER/LIU WITH DS3 MUX & VT-MAPPER - SONET APPLICATIONS
REV. P1.0.6
commands it to do so by setting any one of the bits within the DS3 Framer Block - M23 - DS2 Loop-back
Request Register (Address = 0x0E09) to 1.
BIT7 - Reserved
BIT6 - Transmit DS2 AIS - DS2 Channel 6:
This READ/WRITE bit-field is used to configure the M12 MUX block (associated with DS2 Channel 6) to transmit the
DS2 AIS indicator, towards the Transmit DS3 Framer block (and within the outbound DS3 data-stream).
`
0 - Configures the M12 MUX block (associated with DS2 Channel 6) to transmit normal data.
`
1 - Configures the M12 MUX block (associated with DS2 Channel 6) to transmit the DS2 AIS indicator.
Figure 12
presents an illustration of the XRT86SH328, whenever the M12 MUX has been configured to
transmit the DS2 AIS indicator towards both the M23 MUX and the Transmit DS3 Framer blocks.
BIT 5 - Transmit DS2 AIS - DS2 Channel 5:
See BIT6 description.
T
ABLE
243: DS3 F
RAMER
B
LOCK
- M23 T
RANSMIT
DS2 AIS C
OMMAND
R
EGISTER
(A
DDRESS
= 0
X
0E08)
BIT7
BIT6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Reserved
Transmit
DS2
AIS - DS2
Channel 6
Transmit
DS2
AIS - DS2
Channel 5
Transmit
DS2
AIS - DS2
Channel 4
Transmit
DS2
AIS - DS2
Channel 3
Transmit
DS2
AIS - DS2
Channel 2
Transmit
DS2
AIS - DS2
Channel 1
Transmit
DS2
AIS - DS2
Channel 0
R/O
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
F
IGURE
12. A
N
ILLUSTRATION
OF
THE
XRT86SH328,
WHENEVER
THE
M12 MUX
HAS
BEEN
CONFIGURED
TO
TRANSMIT
THE
DS2 AIS
INDICATOR
TOWARDS
BOTH
THE
M23 MUX
AND
THE
T
RANSMIT
DS3 F
RAMER
BLOCK
STS-1/
STS-3
Telecom
Bus
Interface
Transmit
STS-1/3
TOH
Processor
Block
Receive
STS-1/3
TOH
Processor
Block
Transmit
STS-1 POH
Processor
Block
Receive
STS-1 POH
Processor
Block
VT/TU
De-Mapper
Block
Receive
DS3
Framer
Block
Transmit
DS3
Framer
Block
DS2 AIS Pattern
M23
MUX
Block
M23
De-MUX
Block
Ingress
Direction
Receive
DS1/E1
Framer
Block
Egress
Direction
Receive
DS1/E1
Framer
Block
Ingress
Direction
Transmit
DS1/E1
Framer
Block
Egress
Direction
Transmit
DS1/E1
Framer
Block
Receive
DS1/E1
LIU
Block
Transmit
DS1/E1
LIU
Block
DS3/
STS-1
LIU
Interface
M12
MUX
Block
M12
De-MUX
Block
DS1/E1
Jitter
Atten
Block
DS1/E1 Channel 0
DS1/E1 Channel 0
DS2 Channel 0
From DS1/E1 Channels 1 - 27
From DS2 Channels 1 - 6
To DS2 Channels 1 - 6
From DS1/E1 Channels 1 - 3
To DS1/E1 Channels 1 - 3
To DS1/E1
Channels 1 - 27
VT/TU
Mapper
Block