SX-8881CS02 - 5.8GHz Wireless Bridge

Contents:
  1. Warning Notes
  2. Accessing the Web Configurator
  3. Configuration
  4. Documents
  5. Specification
  6. Teardown
  7. References

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8881CS02-01.webp

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Warning Notes

NOTE 1: After restoring the factory settings, the IP address of both CPE devices is 192.168.0.1. This is different from the IP address on the label on the back of the CPE devices.

label-master label-slave

The "Master" unit is labeled "192.168.88.25 AP" is at 192.168.0.1 after pressing the reset button.
The "Slave" unit is labeled "192.168.88.26 Client" is at 192.168.0.1 after pressing the reset button.

NOTE 2: After changing the password from "admin" to one more secure, I did a reset and the password remained unchanged and was not reset to "admin" as the forget message in the configurator suggested. Make carefull note of any password changes you make:

paswd-forgot.webp

The "Master" unit is labeled "192.168.88.25 AP" is at 192.168.0.1 after pressing the reset button.
The "Slave" unit is labeled "192.168.88.26 Client" is at 192.168.0.1 after pressing the reset button.


8881CS02.webp

The devices work equally well powered by a 12VDC, 2Amp Power supply and a POE injector at 24VAC and 0.5Amp.

NOTE 3. Most 24VAC injectors as passive. That is, they are constantly on, and do not sense the power requiremnts like most of the 48VAC injectors do. Be careful about connection the 24VAC injectors to network devices that are not labled for these injectors.

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Accessing the Web Configurator

  1. Power up both devices
  2. Reset both devices to 192.168.0.1, using the Reset button
  3. Create a network interface on a workstation on 192.168.0 segment, other than 192.168.0.1.
  4. Connect the ethernet cable to the "Master" (AP). No need to connect the "Slave" (Client).
  5. In a browser connect to 192.168.0.1. You should see the 8881CS02's Web Configuration page.
    The url "192.168.0.1" redirects to http://192.168.0.1/mobile/login.asp:

    login-mobile.webp

    The url "http://192.168.0.1/login.asp" present a different style configuration page.
    The login name and password are the same and b oth interfaces appear to provide the same functionallity:

    login-std.webp
  6. I set the Master/AP unit to 192.168.0.25
  7. Disconect the Master and connect the Slave/Client and I set this unit to 192.168.0.26
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Configuration

Mibile Main Menu:

Mobile-Main-Menu.webp

Standard Main Menu:

std-main-menu.webp

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Documents

User Instructions - CPE8881 - Outdoor Wireless WiFi Bridge:
https://www.manualslib.com/download/3011500/Tomlov-Cpe8881.html

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Specification

MAC address prefix C8:EE:A6 is registered to Shenzhen SHX Technology Co., Ltd

Hardware Specification:
CPURealtek RTL8881 533MHz
ManufacturerShenzhen SHX Technology Co. Ltd.
Standards Comply IEEE802.11a/n/ac, IEEE802.3u, IEEE 802.3x
DDR 32Mbyte
FLASH 8Mbyte
Power Supply DC 12V, passive POE 24V
Antenna Internal 12dBi directional panel dual-polarization antenna (horizontal beam 60º, Vertical beam 25º)
RF Power 5.8GHz 20.0 ± 2.0dBm
Ethernet Ports 1 10/100Mbps RJ45 LAN Ports
Reset Button 1x Reset button, Restore factory default settings
Firmware upgrade Through Web and TFTP
LED Indicators LAN,WLAN,RSSI1,RSSI2
Data Transfer Rate 5.8GHz 450Mbps
Transmission Type DSSS
Modulation Type OFDM/BPSK/QPSK/CCK/DQPSK/DBPSK
RF Frequency range 5.180 GHz ~ 5.850 GHz (Channel 36~165)
Product Size 210*95*68mm
Working Temperature -20~+60°C
Working Humidity 10%~95% RH (non-condensation)
Lightning Protection Common mode 1.5KV, differential mode 1KV


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Teardown

SX-8881CS02 with antenna on the rear side:

TD-SX-8881.webp TD-rear.webp

unknown chip under the Heatsink - 8881CS02B?:
Similar to RTL8881 - Realtek - 802.11ac 10/100M Ethernet AP/Router Network Processor:


TD-unknown.webp

W9751G6KB-25 - Surface Mount 84 Pin Memory IC 512 Mb kb 12.5mm mm 165mA:

TD-W9751G6KB-25.webp Datasheet : https://file.aichiplink.com//r/datasheets/winbond-w9751g6kb25-datasheets-7506.pdf

LAN Chip:

TD-LAN1.webp

Board Label:

TD-Label.webp

UART Chip:

TD-UART.webp

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References

CPE (Customer Premise Equipment), literally translated as Customer Premise Equipment, is actually a mobile signal access device that receives mobile signals and forwards them with wireless WIFI signals. CPE is a device that can convert high-speed 4G/5G signals into WiFi signals, and the number of mobile terminals that can support the Internet at the same time is also large. CPE can be widely used in rural areas, towns, hospitals, units, factories, communities, etc. It can be used for wireless network access, which can save broadband costs and eliminate wiring links.

What is CPE? What are the classifications of CPE?:
https://www.niubol.com/Technical-Support/60.html

Introduction to Operation Modes (CPE and WBS):
https://www.tp-link.com/us/configuration-guides/introduction_to_operation_modes_cpe_and_wbs_/?configurationId=18702#_idTextAnchor000

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20241216 - pre published v0.9