TXC-06412BROG Transwitch Corporation, TXC-06412BROG Datasheet - Page 121

• Manufacturer Part Number: TXC-06412BROG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06412BROG

• Lead Free Status / Rohs Status: Compliant

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11.0 H
11.1 LINE AND APS SIDE POINTER TRACKING, RETIMING AND POINTER GENERATION
11.2 DETECTION OF CONCATENATED STRUCTURES
The PHAST-12P will perform high order pointer processing and retiming on the H1/H2 pointer
bytes from the received lines and from the APS Port.
The pointer tracking process will be performed according to the generic requirements for a
SDH/SONET pointer tracker based on ETSI/ITU-T/ANSI standards.
The retiming process will retime the incoming STM-4/OC-12 or 4*STM-3/4*OC-3 lines and
the received APS signal to the system clock.
The path AIS (dAIS), loss of pointer (dLOP) and FifoError defect will be detected per high
order path.
The PHAST-12P pointer tracker and retimer will insert AIS per high order path towards the
high order cross connect according to the following expression:
Incoming and outgoing pointer increments and decrements will be counted for performance
monitoring.
Received SS bits are reported by the pointer tracking process. SS bits to be generated by the
retiming process are configurable.
The incoming pointer bytes are analyzed for concatenation indicators (Y1*). A Concatenation
configuration is set up and locked after four identical configurations. A (latched) indication is
given to software when a new configuration has been detected and the entire detected
configuration is reported by 12 bits. A ‘1’ means a concatenation indication (Y1*) has been
detected on the pointer bytes of the corresponding timeslot.
Important note: This concatenation detector only detects the concatenation indicators of the
incoming pointer bytes. The detected configuration only serves as status, reported to
software and is never used to configure the pointer tracking process.
IGH
- High Order Pointer Tracking, Retiming and Pointer Generation -
aAIS
O
[path]
RDER
=
+
+
+
+
P
dAIS
dLOP
dTSF
FifoError
FifoError_AIS_Insert_Disable
AIS_Force
OINTER
AND
[path]
[path]
[path]
[path]
[path]
* not TSF_AIS_Insert_Disable
* not AU_AIS_AIS_Insert_Disable
* not LOP_AIS_Insert_Disable
P
* not
T
OINTER
RACKING
PRELIMINARY TXC-06412B-MB, Ed. 2
G
PHAST-12P Device
ENERATION
, R
ETIMING
DATA SHEET
TXC-06412B
June 2005