Show pagesourceOld revisionsBacklinksBack to top × Table of Contents Comtrend CT-536+ Hardware Highlights Flashing the firmware Specific Configuration Hardware Info Photos Opening the case Serial JTAG Debricking Bootloader Mods Hardware mods USB Notes Tags Comtrend CT-536+ This device is NOT RECOMMENDED for future use with OpenWrt due to low flash/ram. DO NOT BUY DEVICES WITH 4MB FLASH / 32MB RAM if you intend to flash an up-to-date and secure OpenWrt version onto it! See 4/32 warning for details. 1) This device does not have sufficient resources (flash and/or RAM) to provide secure and reliable operation. This means that even setting a password or changing simple network settings might not be possible any more, rendering the device effectively useless. See OpenWrt on 4/32 devices what you can do now. 2) OpenWrt support for this device will end after 2019. 19.07 will be the last official build for 4/32 devices. After 19.07, no further OpenWrt images will be built for 4/32 devices. See OpenWrt on 4/32 devices what you can do now. Comtrend CT 536+ / HG 536+ is based on a Broadcom proccessor (board ID 96348GW-11). Hardware Highlights 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 Flashing the firmware 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. Specific Configuration PPPoE NOTE: Onboard DSL modem is NOT SUPPORTED However you can connect an external modem bridged to a LAN port. 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 QoS 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 Hardware Info Architecture: MIPS Vendor: Broadcom bootloader: cfe System-On-Chip: BCM6348 CPU/Speed BMIPS3300 V0.7 / 256 MHz Flash-Chip: Macronix MX29LV320ABTC-90G Flash size 4 MiB RAM HY57V283220TP-7 / 16 MiB Wireless: Broadcom 4318 rev. 9, 802.11b/g (mini-pci) Antenna 1x 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 Serial: Yes JTAG: Yes Photos Model Number Front of the casing Back of the casing Opening the case 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. Main PCB Serial → port.serial general information about the serial port, serial port cable, etc. How to connect to the Serial Port of this specific device: Use a serial TTL adapter. JTAG → port.jtag general information about the JTAG port, JTAG cable, etc. How to connect to the JTAG Port of this specific device: Debricking → generic.debrick Bootloader Mods you could read about bootloader in general Hardware mods as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience! USB It has to be soldered, see here: usb_mod Required materials 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 Notes Tags How to add tags bcm63xx, bcm6348, 4Flash, 16RAM, 4Port, FastEthernet, 1NIC, 1WNIC, USB, b43, MIPS, MIPS32 This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.OKMore information about cookies bcm63xx bcm6348 4Flash 16RAM 4port fastethernet 1nic 1wnic usb b43 mips mips32 Last modified: 2021/01/15 17:29by danitool