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toh:comtrend:ct536plus [2015/10/18 15:23] – ↷ Links adapted because of a move operation tmomastoh:comtrend:ct536plus [2019/02/12 21:51] – 432 warning added tmomas
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 +====== Comtrend CT-536+ ======
  
 +{{section>meta:infobox:432_warning#infobox_for_dataentries&noheader&nofooter&noeditbutton}}
 +
 +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 =====
 +
 +<WRAP center round important 60%>
 +As reported in the [[https://forum.openwrt.org/viewtopic.php?id=43764|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.
 +</WRAP>
 +
 +
 +The OpenWrt correct firmware is **openwrt-96348GW-generic-squashfs-cfe.bin**, which can be directly flashed from the original firmware page.
 +
 +Notice that [[http://downloads.openwrt.org/backfire/|''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:** **<color crimson>Onboard DSL modem is NOT SUPPORTED</color>**
 +
 +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:
 +
 +<code>
 +uci set network.wan.proto=pppoe
 +uci set network.wan.username=
 +uci set network.wan.password=
 +uci commit network && ifup wan</code>
 +
 +=== 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:
 +<code>
 +opkg install qos-scripts
 +</code>
 +
 +Basic QoS configuration using UCI:
 +
 +<code>
 +uci set qos.wan.upload=192            # Upload speed in KB
 +uci set qos.wan.download=2048         # Download speed in KB
 +uci commit qos
 +</code>
 +
 +Start QoS and enable on next boot
 +
 +<code>
 +/etc/init.d/qos start
 +/etc/init.d/qos enable
 +</code>
 +
 +===== Hardware =====
 +==== Info ====
 +| **[[wp>Instruction set|Architecture]]:**   | [[wp>MIPS architecture|MIPS]]                |
 +| **Vendor:**                                | [[wp>Broadcom]]                              |
 +| **[[docs:techref:bootloader]]:**            | [[docs:techref:bootloader:cfe]]               |
 +| **[[docs:techref:hardware:soc|System-On-Chip]]:**   | {{:media:datasheets:bcm6348_product_brief.pdf|BCM6348}} |
 +| **[[docs:techref:hardware:cpu|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 {{:media:datasheets:bcm5325_datasheet.pdf|BCM5325}} w/ vlan support [[docs:techref: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   |
 +| **[[docs:techref:hardware:port.serial|Serial]]:**   | [[#Serial|Yes]]                                          |
 +| **[[docs:techref:hardware:port.jtag|JTAG]]:**       | [[#JTAG|Yes]]                                            |
 +
 +==== Photos ====
 +Model Number
 +
 +**Front of the casing**\\
 +{{media:comtrend:ct-536plus_case_front.jpg?500|}}
 +
 +**Back of the casing**\\
 +{{media:comtrend:ct-536plus_case_rear.jpg?500|}}
 +{{media:comtrend:ct-536plus_label.jpg?500|}}
 +
 +==== 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//\\
 +{{media:comtrend:ct-536_board_a.jpg?500}}
 +
 +==== Serial ====
 +-> [[docs:techref:hardware:port.serial]] general information about the serial port, serial port cable, etc.
 +
 +How to connect to the Serial Port of this specific device:\\
 +{{media:comtrend:ct-536_serial.jpg?300}}
 +
 +Use a serial TTL adapter.
 +
 +==== JTAG ====
 +-> [[docs:techref:hardware:port.jtag]] general information about the JTAG port, JTAG cable, etc.
 +
 +How to connect to the JTAG Port of this specific device:\\
 +{{media:comtrend:ct-536_jtag.jpg?300}}
 +
 +
 +===== Debricking =====
 +-> [[docs:guide-user:troubleshooting:generic.debrick]]
 +
 +===== Bootloader Mods =====
 +  - you could read about [[docs:techref:bootloader]] in general
 +
 +
 +===== Hardware mods =====
 +  - as a beginner, you really should inform yourself about [[docs:techref:hardware:soldering]] in general and then obtain some practical experience!
 +==== USB ====
 +It has to be soldered, see here:\\
 +[[toh/comtrend/ct5621#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 =====
 +[[meta:tags|How to add tags]]
 +
 +{{tag>bcm63xx bcm6348 FastEthernet 4Port 1NIC 1WNIC USB b43 16RAM 4Flash MIPS MIPS32}}
  • Last modified: 2024/10/06 16:03
  • by danitool