
XRT94L33
xr
Rev.1.2.0.
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
348
Transmit
UTOPIA
Interface
Block
Transmit
UTOPIA
Interface
Block
Receive
UTOPIA/
Interface
Block
Receive
UTOPIA/
Interface
Block
Transmit
ATM
Cell Processor
Block
Transmit
ATM
Cell Processor
Block
Receive
ATM
Cell Processor
Block
Receive
ATM
Cell Processor
Block
Transmit
PPP
Processor
Block
Transmit
PPP
Processor
Block
Receive
PPP
Processor
Block
Receive
PPP
Processor
Block
Receive
STS-3/12
TOH
Processor
Block
Receive
STS-3/12
TOH
Processor
Block
Transmit
STS-3/12
TOH
Processor
Block
Transmit
STS-3/12
TOH
Processor
Block
Receive
STS-3/12
POH
Processor
Block
Receive
STS-3/12
POH
Processor
Block
Transmit
STS-3/12
POH
Processor
Block
Transmit
STS-3/12
POH
Processor
Block
STS-3/12
Telecom
Bus
Interface
Block
STS-3/12
Telecom
Bus
Interface
Block
STS-3/12
PECL
Interface
Block
STS-3/12
PECL
Interface
Block
STS-3/12
CDR
Block
STS-3/12
CDR
Block
XRT95L34 – Channel 0
Transmit
POS-PHY
Interface
Block
Transmit
POS-PHY
Interface
Block
Receive
POS-PHY
Interface
Block
Receive
POS-PHY
Interface
Block
Clock
Synthesizer
Block
Clock
Synthesizer
Block
Microprocessor
Interface
Block
Microprocessor
Interface
Block
LOF
AIS-P
The user can implement this configuration by setting Bits 2 (Transmit AIS-P [down-stream] upon LOF) and 0
(AUTO AIS), within the “Receive STS-3 Transport – Auto AIS Control” Register, to “1” as depicted below.
Receive STS-3 Transport – Auto AIS Control Register (Address = 0x1163)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit
AIS-P
(down-
stream)
upon
Section
Trace
Message
Unstable
Transmit
AIS-P
(down-
stream)
upon
Section
Trace
Message
Mismatch
Transmit
AIS-P
(down-
stream)
upon SF
Transmit
AIS-P
(down-
stream)
upon SD
Transmit
AIS-P
(down-
stream)
upon Loss
of Optical
Carrier
Transmit
AIS-P
(down-
stream)
upon LOF
Transmit
AIS-P
(down-
stream)
upon LOS
AUTO AIS
R/W
0
1
0
1
Of course, if the Receive STS-3 TOH Processor block transmits the AIS-P indicator towards the Receive
STS-3c POH Processor block, then all of the following will happen.
The Receive STS-3c POH Processor block will declare the AIS-P defect condition.
The corresponding Receive ATM Cell Processor block will declare the LCD (Loss of Cell Delineation)
defect condition.
2.3.1.4
THE AIS-L (LINE AIS) DEFECT DECLARATION AND CLEARANCE CRITERIA