TXC-06312BIOG Transwitch Corporation, TXC-06312BIOG Datasheet - Page 98

• Manufacturer Part Number: TXC-06312BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06312BIOG

• Lead Free Status / Rohs Status: Supplier Unconfirmed

PRELIMINARY TXC-06312B-MB, Ed. 2
June 2005
PHAST-12N Device
DATA SHEET
TXC-06312B
10.8 REGENERATOR SECTION (SECTION) OVERHEAD PROCESSING
10.8.1 Regenerator Section Overhead Generator
The PHAST-12N device complies to the latest ITU/ETSI/ANSI standards and features
regarding the generation and monitoring of the Regenerator Section Overhead bytes.
The PHAST-12N generates the Regenerator Section overhead bytes of one STM-4/OC-12 or
four STM-1/OC-3 signals.
• 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-
• BIP-8 will be calculated over all bits of the preceding STM-n frame after scrambling and
• The D1-D3 bytes will optionally be inserted from
• 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.
will be inserted in the B1 byte of the current frame before scrambling. The software con-
figurable B1 byte has a special behavior, in that the filled in byte is used as an error-mask
to corrupt the calculated B1 byte.
it.
(which indicates there is something wrong in the APS connection).
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Operation
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