Different Definitions of Serial Bytes Cause Failure of Interconnection Between OptiX OSN Equipment and OptiX Metro Equipment

When the OptiX OSN equipment and OptiX Metro equipment are interconnected, broadcast data services are available only if broadcast data ports are interconnected correctly.

Product

• OptiX OSN 1500A/1500B
• OptiX OSN 2500
• OptiX OSN 3500
• OptiX OSN 3500 II
• OptiX OSN 7500

Fault Type

Equipment interconnection failure

Symptom

The S1 port on the OptiX OSN equipment is interconnected with the S1 port on the OptiX Metro 1000 to transmit a broadcast data service. The broadcast data service is however unavailable.

Cause Analysis

The OptiX equipment uses four unused overhead bytes to transmit broadcast data services.

The broadcast data ports on the OptiX OSN equipment are defined as follows:

• For the OptiX OSN equipment, the Serial 1 byte is defined as the first unused byte following the D3 byte in the SDH RS overhead bytes. Generally, the Serial 1 byte corresponds to the S1 port.
• For the OptiX OSN equipment, the Serial 2 byte is defined as the second unused byte following the D3 byte in the SDH RS overhead bytes. Generally, the Serial 2 byte corresponds to the S2 port.
• For the OptiX OSN equipment, the Serial 3 byte is defined as the second unused byte following the D12 byte in the SDH MS overhead bytes. Generally, the Serial 3 byte corresponds to the S3 port.
• For the OptiX OSN equipment, the Serial 4 byte is defined as the first unused byte following the D4 byte in the SDH MS overhead bytes. Generally, the Serial 4 port corresponds to the S4 port.

The broadcast data ports on the OptiX OSN equipment are defined as follows:

• For the OptiX Metro equipment, the Serial 1 byte corresponds to the F2 byte and is defined as the second unused byte following the D12 byte in the SDH MS overhead bytes. Generally, the Serial 1 byte corresponds to the F2 port.
• For the OptiX Metro equipment, the Serial 2 byte corresponds to the X1 byte and is defined as the first unused byte following the D4 byte in the SDH MS overhead bytes. Generally, the Serial 2 byte corresponds to the COM2 port.
• For the OptiX Metro equipment, the Serial 3 byte corresponds to the X2 byte and is defined as the first unused byte following the D3 byte in the SDH RS overhead bytes. Generally, the Serial 3 byte corresponds to the COM3 port.
• For the OptiX Metro equipment, the Serial 4 byte corresponds to the X3 byte and is defined as the second unused byte following the D3 byte in the SDH RS overhead bytes. Generally, the Serial 4 byte corresponds to the COM4 port.

The correspondence relationships between the serial ports on the OptiX OSN equipment and the OptiX Metro equipment are as follows:

• The Serial 1 byte on the OptiX Metro equipment corresponds to the Serial 3 byte on the OptiX OSN equipment.
• The Serial 2 byte on the OptiX Metro equipment corresponds to the Serial 4 byte on the OptiX OSN equipment.
• The Serial 3 byte on the OptiX Metro equipment corresponds to the Serial 1 byte on the OptiX OSN equipment.
• The Serial 4 byte on the OptiX Metro equipment corresponds to the Serial 2 byte on the OptiX OSN equipment.

The analysis shows that the broadcast data service is unavailable due to incorrect interconnection between the broadcast data ports on the OptiX OSN and OptiX Metro equipment.

Procedure

1. Re-configure the broadcast data service according to the correspondence relationships between the broadcast data ports on the OptiX OSN equipment and OptiX SDH equipment.

Related Information

None.

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