中兴F1855V2拆机

10 Gigabit EPON gateway ZTE F1855v2 disassembly

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Do not get excited, on a full gigabit network port 10G-EPON Optical modem, the price is not expensive, $ 15, take apart to see what configuration.

Optical modem most put in the weak box, it does not care about its appearance, as long as it is small, but this appearance is not small, the antenna can be folded up does not take up space.

中兴F1855V2拆机

For the interfaces, there are 3 LAN ports, 1 ITV port, all at Gigabit rate; there is also a USB 2.0 and phone line port.

中兴F1855V2拆机

Fuselage bottom label.

中兴F1855V2拆机

Disassembling the bottom case.

中兴F1855V2拆机

CPU above the sticky piece of thin aluminum, a moment to see what CPU.

中兴F1855V2拆机

Remove the motherboard.

中兴F1855V2拆机

Use a hair dryer to blow a while the black aluminum heat sink, easy to take off:

中兴F1855V2拆机

This heatsink uses a heat sink spacer to adhere to the CPU to enhance thermal conductivity.

中兴F1855V2拆机

The CPU model is ZX279131 (ZTE Microelectronics), A9 architecture, dual-core 1.2GHz, because I could not see a switch chip, so I concluded that it integrated 4 gigabit PHY. integrated 10G/2.5G/1G optical MAC.

The overall parameters are very similar to SD5182H.

中兴F1855V2拆机

The left side of the CPU has the memory chip, model number H5TQ4G63EFR-RDC, 512MB capacity, Hynix DDR3 memory particles.

中兴F1855V2拆机

The other side of the motherboard is the wireless circuit, there are two wireless chips, respectively MT7613AEN and MT7603EN. the former is a 5G chip, 2x2mimo 866mbps, the latter is a 2.4G chip, 2x2mimo 300Mbps, this is a wireless solution for AC1200, are no external amplifier chip.

中兴F1855V2拆机

There is a capacitor as big as a cow near the DC input circuit, 16V/3300 microfares.

中兴F1855V2拆机

There is one chip in the power supply circuit: Si32192.

中兴F1855V2拆机

Applications of Si32192.

VoIP Gateways and Routers
xDSL IADs
Optical Network Terminals/Units (ONT/U)
Analog Terminal Adapters (ATA)
Cable eMTA
Wireless Fixed Terminals (WFT)
Wireless Local Loop (WLL)
WiMAX CPE

 

Next, open the only shield:

中兴F1855V2拆机

A piece of thermally conductive silicone gasket is located under the shield to help dissipate heat from the fiber optic front end.

中兴F1855V2拆机

The lower chip, model GN28L95, is a PHY chip.

Integrated 10 Gbps limiting post amplifier and 2.5 Gbps burst mode laser driver for 10 Gbps PON applications

中兴F1855V2拆机

The parameters of GN28L95 are as follows.

Patented and proven automatic laser calibration is compatible with a wide range of industry lasers
Programmable 2.5 gigabit Tx with eye-shaping to optimize laser performance
Programmable 10 gigabit Rx with equalization and pre-emphasis to optimize APD performance
Integrated APD controller with fast fault protection

10G EPON & XGPON1 FTTh ONU/ONT BoB designs
Next Generation 10G PON ONU/ONT

 

The TTL pins are defined as shown below, with a baud rate of 115200 and a voltage of 3.3V.中兴F1855V2拆机

 

Turn over and look at the back of the motherboard, there is a flash memory chip, model PN26G01AWSIUG, capacity 128MB. SPI NAND Flash.

中兴F1855V2拆机

So far, all the demolition is finished.

中兴F1855V2拆机

Because it is WiFi 5 wireless, this chip regardless of whether there is an external amplifier, the signal will not be strong, do not expect it to have a large coverage capacity, I will not test the signal.

This Optical modem can not just buy to change on, to consider whether the server room in your area to support it.

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