TXC-06312BIOG Transwitch Corporation, TXC-06312BIOG Datasheet - Page 100

• 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
10.9 MULTIPLEX SECTION (LINE) OVERHEAD PROCESSING
10.9.1 Multiplex Section Overhead Generator
10.9.2 Multiplex Section Overhead Monitor
The PHAST-12N device is compliant to the latest ITU/ETSI/ANSI standards and features
regarding the generation and monitoring of the Multiplex Section Overhead bytes.
The PHAST-12N generates the Multiplex Section overhead bytes of one STM-4/OC-12 or
four STM-1/OC-3 signals.
The PHAST-12N terminates the Multiplex Section overhead bytes of one STM-4/OC-12 or
four STM-1/OC-3 signals.
• BIP-nx24 will be calculated over all bits of the preceding STM-n frame except the first
• Per line the internal or the external ring port can be selected as source for the REI and
• The REI will be inserted into the M1 byte
• The RDI will be inserted into the K2 byte
• The MSP APS signal will be inserted into the K1-K2 bytes from
• The D4-D12 bytes will optionally be inserted from
• The E2 byte will optionally be inserted from
• The synchronization status message will be inserted into the S1 byte. The sources are
• BIP-nx24 will be calculated over all bits of the preceding STM-n frame except the first
three SOH rows and will be inserted in the B2 bytes of the current frame. The software
configurable B2 bytes have a special behavior, in that the filled in bytes are used as an
error-mask to corrupt the calculated B2 bytes
RDI indications
• The receive APS Port
• The transmit receive TOH RAM
• The transmit DCC interface, if the latter is configured for MS DCC
• The transmit TOH byte interface
• The transmit TOH RAM
• The transmit TOH byte interface
• The transmit TOH RAM
• The transmit TOH byte interface
• The transmit TOH RAM
three SOH rows and will be compared to the B2 bytes of the current frame. The software
readable B2 bytes have a special behavior, in that the transmitted bytes represent the
error mask (difference between calculated and received bytes).
• An errored near-end block nN_B will be counted for performance monitoring if one or
• The error count per frame will be forwarded to the internal and external line ring ports
more errors in a STM-n frame are detected by the BIP-nx24. Optionally bit errors will
be counted
as REI indication for the mate TOH generator
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Operation
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1 0 0 o f 2 0 2