OPUK

ODUK

OCH

OTUK

The essence of QPSK modulation is to reduce the baud rate of the optical signal by half without reducing the line rate by selecting 4 possible values in the phase of the optical field.

PDM-QPSK technology is the main modulation code technology for 100G transmission, which can reduce the line rate of 112Gb/s to the baud rate of 28Gbaud/s, greatly reducing the loan requirements for (optical)

electrical devices.

PDM polarization multiplexing technology is adopted, which has better nonlinear tolerance than 40GePDM-BPSK.

PDC-QPSK supports DCMfree and DCM system applications, and supports smooth upgrade from existing 10G/40G network to 100G system.

FEU board IN/OUT port

OTU unit line side port

M40V board OUT port

The OUT port of the OAU1 board

The higher the priority value of the E-Trunk, the higher the priority.

The active and standby devices periodically send Hello packets to each other

The ID of the E-Trunk is used to identify an E-Trunk

Able to achieve link aggregation across devices

Direct modulation light source

Light source of EA modulation method

MZ modulation light source

Coherent reception modulation mode light source

The Raman amplifier selects different pump sources to amplify signals in different bands, so the Raman amplifier has no gain bandwidth limit in theory, while the EDFA has a range of gain bandwidth

The equivalent noise figure of the Raman amplifier is smaller than that of the EDFA

The gain calculation/testing method of Raman amplifier and EDFA is consistent, both are " gain = output power - input power "

The gain medium of Raman amplifier is transmission fiber: while the gain medium of EDFA is EDF (Erbium Doped Fiber)

Current Framework

Next frame

Previous frame

None of the above

MPLS Pin A.

CC

LT

MPLS Tracert

All personnel entering the computer room should wear anti-static shoes, anti-static clothing, etc.

Use anti-static tools, such as: anti-static wrists, anti-static tweezers, pullers, etc.

Controlling humidity has little effect on reducing static electricity

All conductors in the computer room must be grounded reliably, including computer terminals and other equipment, and an anti-static workbench must be set up

Static sources such as non-anti-static plastic bags, non-anti-static bubble films, and rubber should be kept away from ESD sensitive devices and sensitive boards, at least 30cm away.

AIS

LCK

IAE

BDI