Network elements A, B, and C are OSN 3500 forming a chain network. The two stations A and C are connected to routers. The IP routers are connected to the OptiX SDH equipment through the POS port of STM-1. The PAS port connects J1 and C2 bytes. It is also used as a payload to transfer bytes (used to carry services). The network element A to the network element C creates a VC4 service, and the network element B uses VC4 to pass through.
In this case, is there an alarm report inside the SDH network?

• A.There is a J1 mismatch alarm
• B.No warning
• C.There is a C2 not loaded alarm
• D.There is a C2 mismatch alarm

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When configuring the Ethernet service, the value of the J1 byte in the higher-order channel overhead should be the same as the value that should be received, but the Ethernet single board EGT2 and EFS0 both generate the HP_TIM alarm. C

• A.The mode set by the J1 byte is inconsistent
• B.EGT2 and EFS0 cannot be connected
• C.EGT2 and EFS0 protocol are inconsistent
• D.Light path failure

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Regarding the 10G/100G mixed transmission wavelength isolation band, is the following statement wrong? ()

• A.In order to avoid rerouting into the isolation band, the optical layer ASON prohibits 10G and coherent mixed optical layer ASON
• B.The isolation band can be filled with 40G DQPSK wavelength or 40G ODB wavelength
• C.The mixed transmission cost is related to the number of transmission spans, the width of the isolation band, and the FEC encoding method
• D.The coherent signal starts from the long wavelength, and 10G starts from the short wavelength, with an isolation band in between

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An operator needs to configure 60 clients, 200 OptiX PTN 1900, 100 OptiX OSN 3800 (With ASON), 150 NE40E, 200 CX600 series equipment, and the access side is equipped with FTTx OLT and MDU, a total of 80,000 xDSL lines , 70,000 lines of PSTN ports, 30 OLTs and 300 MDU devices are deployed.
Regarding the description of this network, the error is:

• A.The number of physical network elements to be managed by the network management center is 980
• B.In practice, 50% of the current network size needs to be reserved for expansion capacity
• C.The number of equivalent network elements for 100 OptiX OSN 3800 (With ASON) is 350
• D.The network is a medium-scale network

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A path is a transmission entity, which is connected by a pair of "one-way paths" that can simultaneously transmit information in opposite directions between their respective outputs and inputs.

• A.TRUE
• B.FALSE

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