Comtrend CT 536+ / HG 536+ is based on a Broadcom proccessor (board ID 96348GW-11).
|SoC||CPU speed||Ram||Flash||Network||DSL port||USB||Serial||JTag||Buttons|
|Broadcom 6348||256MHz||16MiB||4MiB||4 x 1||no driver||requires soldering||Yes||Yes||One: Reset|
As reported in the Attitude adjustment announcement, for 16MiB of RAM devices you should better stay with Backfire (linux 2.6.32), or you will experience contention problems due to an often lack of free memory.
The OpenWrt correct firmware is openwrt-96348GW-generic-squashfs-cfe.bin, which can be directly flashed from the original firmware page.
Notice that ''Backfire'' does not implement the failsafe boot with the reset button yet, for this router. Failsafe can be triggered only through the serial line.
A usual procedure to flash with OpenWrt using the factory CFE bootloader:
- Download your .bin image
- Set up a LAN connection with the router, your computer having the IP 192.168.1.2 (on some Comtrend CT 536+ it has to be 192.168.1.100, so change to .100 if .2 doesn't work)
- While pressing the reset button, power on the device and keep the button for 10 seconds
- Once releasing the reset button, you can browse to http://192.168.1.1 and a web page will prompt you for a .bin firmware file. Provide the openwrt file and submit it.
- Wait some minutes, and OpenWrt will be ready at 192.168.1.1.
This procedure will not overwrite the CFE bootloader, so you can use it later to reflash the router with any other firmware.
NOTE: Onboard DSL modem is fully unsupported
All required packages are already installed in the default image.To configure PPPoE with UCI, do this:
uci set network.wan.proto=pppoe uci set network.wan.username= uci set network.wan.password= uci commit network && ifup wan
Note: if you need QoS for consistent low latency on an ADSL connection, which is a common scenario, you should consider installing the
dsl-qos-queue package instead. It works much better than the Linux QoS because it does factor in the ATM overhead, which can be significant.
Install the qos-scripts package:
opkg install qos-scripts
Basic QoS configuration using UCI:
uci set qos.wan.upload=192 # Upload speed in KB uci set qos.wan.download=2048 # Download speed in KB uci commit qos
Start QoS and enable on next boot
/etc/init.d/qos start /etc/init.d/qos enable
|CPU/Speed||BMIPS3300 V0.7 / 256 MHz|
|Flash size||4 MiB|
|RAM||HY57V283220TP-7 / 16 MiB|
|Wireless:||Broadcom 4318 rev. 9, 802.11b/g (mini-pci)|
|Ethernet:||Broadcom BCM5325 w/ vlan support swconfig|
|USB||possible with mod|
|Power adapter||16.5 V AC 850 mA / EVERGLOW adv165085|
|Power margin||succesfully tested with a power adapter of 18 V 500 mA|
Photo of front of the casing
Photo of back of the casing
Note: This will void your warranty!
To open the case remove the two rubber feet on the opposite site to the antenna jack, they will reveal two crosspoint screws.
Photo of PCB
→ port.serial general information about the serial port, serial port cable, etc.
How to connect to the Serial Port of this specific device:
Photo of PCB with markings
Use a serial TTL adapter.
→ port.jtag general information about the JTAG port, JTAG cable, etc.
How to connect to the JTAG Port of this specific device:
Photo of PCB with markings
- you could read about bootloader in general
- as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience!
It has to be soldered. See: Photo Link
- 1 x LM7805 (Voltage regulator, consider a step-down model)
- 1 x Ceramic capacitor 0,33uF 20V
- 1 x Ceramic capacitor 0,1uF 5V
- 1 x Electrolytic capacitor 100uF 25V
- 3 x Resistors 15K 0,25W
- 1 x USB Connector
For some Help with the Tags, please have a look here: tags
toh/comtrend/ct536plus.txt · Last modified: 2013/06/15 19:55 (external edit)