TXC-06412BIOG Transwitch Corporation, TXC-06412BIOG Datasheet - Page 104
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TXC-06412BIOG
Manufacturer Part Number
TXC-06412BIOG
Description
Manufacturer
Transwitch Corporation
Datasheet
1.TXC-06412BIOG.pdf
(226 pages)
Specifications of TXC-06412BIOG
Lead Free Status / RoHS Status
Not Compliant
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PHAST-12P Device
DATA SHEET
TXC-06412B
PRELIMINARY TXC-06412B-MB, Ed. 2
June 2005
10.8 REGENERATOR SECTION (SECTION) OVERHEAD PROCESSING
10.7.2 APS Interface Monitor
10.8.1 Regenerator Section Overhead Generator
The PHAST-12P terminates the APS interface overhead bytes.
The PHAST-12P device complies to the latest ITU/ETSI/ANSI standards and features
regarding the generation and monitoring of the Regenerator Section Overhead bytes.
The PHAST-12P generates the Regenerator Section overhead bytes of one STM-4/OC-12 or
four STM-1/OC-3 signals.
• Loss of Lock (LOL) of the on-chip clock and data recovery will be reported
• Frame alignment is recovered from the A1-A2 bytes of the received signals
• Errors in the frame alignment signal will be detected and reported as OOF
• The signal will be descrambled, except for the first SOH row
• The single byte Trail Trace Identifier (TTI) in the J0 byte will be compared to an expected
• The accepted Trail Trace Identifier will be reported
• The Z0 bytes are ignored
• BIP-8 will be calculated over all bits of the preceding STM-4 like APS frame before
• B1 BIP-8 errored blocks will be counted in a one second performance counter
• 3 subsequent frames with B1 BIP-8 errored blocks will be reported as a degraded signal
• B2 bytes are ignored.
• Rx K1, Tx K1, Rx K2, Tx K2, Status and Request are monitored according to the APS
• All other (unused) bytes are ignored.
• The frame alignment signal will be inserted in the A1-A2 bytes
• The signal will be scrambled, except for the first SOH row
• A single or 16 byte Trail Trace Identifier will be inserted in the J0 byte
• The interleave depth coordinate can be inserted in the Z0 bytes for backwards compati-
• Software will be able to disable descrambling for test purposes
value and the TTI Mismatch defect (TIM) will be detected
descrambling and will be compared to the B1 byte of the current frame after descrambling
(B1_Error) alarm, 5 subsequent non-errored frames will clear the B1_Error alarm.
Remark the B1 BIP-8 errored blocks continues to count the errored frames on incoming
SSF. As a consequence B1_Error will also be declared. Note:
• B1_Error is not a standard SONET/SDH defect. No consequent actions are defined for
• APS is a dedicated interface and the only reason for incoming SSF is Loss Of Frame
• In the Line RSOH monitor the B1 counter is frozen on incoming SSF.
protocol
• Software will be able to disable scrambling for test purposes
bility. Note the Z0 bytes need to be carefully chosen in order to guarantee enough transi-
tions on the first TOH row.
it.
(which indicates there is something wrong in the APS connection).
-
Operation
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1 0 4 o f 2 26
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