Dlink 655 router

TrishaM

Can anyone tell me where on this router you can find your connected speed? or snr and attenuation values?

Thanks

Sooler

try http://192.168.2.1/

TrishaM

nope, I am logged into the router no prob, but dont seem to be able to find the info. wondered if there where any hidden pages..

asbokid

It's an 802.11n wireless router, with gigabit ethernet ports but no ADSL modem or cable modem.

http://www.dlink.com/products/?pid=530
ftp://ftp10.dlink.com/pdfs/products/DIR-655/DIR-655_ds.pdf

What speed did you want to find? The line-sync speed of the connection you have with the big bad internet?

If so, you will need to log-in to the broadband modem router. Are you on cable or on an ADSL connection?

TrishaM

I have fibre via bt so they have supplied the modem, but have just found out you cant access the modem as no one has thought of a way to do it yet. was just interested to see what the line speeds were along with the snr and attenuation values. so I suppose I will have to wait.. must say this fibre is so far so good.

asbokid

TrishaM wrote: »

I have fibre via bt so they have supplied the modem, but have just found out you cant access the modem as no one has thought of a way to do it yet. was just interested to see what the line speeds were along with the snr and attenuation values. so I suppose I will have to wait.. must say this fibre is so far so good.

You lucky sod getting fibre, Trisha!

Did you read this? The modem is apparently a Huawei Echolife HG612..

http://forums.thinkbroadband.com/btsupplier/3820290-the-bt-fttc-line-stats-thread.html?page=12&fpart=all&vc=1

asbokid

I've just eyeballed the PCB for the BT Infinity modem which is a re-badged Huawei HG612. [1]

I believe the Huawei HG612 is based on the Broadcom BCM6368/BCM6306 Residential VDSL2/ADSL2+ Gateway System on a Chip (SOC) solution. [2]

The BCM6368 "combines a VDSL2/ADSL2+ transceiver and AFE with a high-performance multicore MIPS32 CPU, ATM/PTM hardware SAR, hardware packet-processing accelerator, Gigabit Ethernet switch core with four 10/100 Ethernet PHYs and dual GMII interfaces, dual USB Host/Device, multichannel TDM/PCM bus, parallel expansion bus supporting CardBus, and mini-PCI into a single high-performance monolithic device." [3]

"The VDSL2/ADSL2+ transceiver delivers 100 Mbps downstream and 50 Mbps upstream (100 Mbps upstream with external AFE), enhanced QoS for IPTV video, dual-latency framing, ATM or PTM physical layer, DSL channel bonding, and embedded operations channels for remote management of the CPE." [4]

If it is Broadcom-based then the firmware will contain a MIPS Linux kernel, and probably the same set of user applications detailed for a similar device known as the Neuf Box [5]. On the Neuf Box website there are also instruction for building the cross-compiler toolchain.

Looking at the photo from [1] and shown towards the top left of the modem PCB, between the word 'INTERNET' and the heatsink of the Broadcom IC, are ten solder pads. These are arranged in two rows of five pads. The lower row of those pads are labelled {TCK, TRST, TDO, TDI and TMS} This identifies them as the test access port (TAP) of the JTAG interface to the board. [6]

There is a proprietary MIPS extension to JTAG known as EJTAG, and this is supported by the Broadcom BCM6368. Details of the EJTAG interface are provided at [7].

Using the JTAG to hack the embedded code on routers and modems is described at [8].

The uppermost row of five solder pads, just above the JTAG port, has pads labelled RX, (NULL), VCC, GND, TX. This identifies them as header pins for a UART (async serial) interface which the BCM6368 also provides and could be used to gain a serial console.

Hopefully there's something interesting there for an idle hacker!

[1] http://www.nodomain.org/vdslmodem.jpg
[2] http://www.broadcom.com/products/Broadband-Carrier-Access/xDSL-CPE-Solutions/BCM6368
[3] http://www.icmaster.com/Datasheet.ashx?mfg=4128&part=BCM6368
[4] http://www.broadcom.com/products/Broadband-Carrier-Access/xDSL-CPE-Solutions/BCM6306
[5] http://www.efixo.com/neufbox4/freesoftware/
[6] http://en.wikipedia.org/wiki/Joint_Test_Action_Group
[7] http://www.linux-mips.org/wiki/JTAG
[8] http://www.dd-wrt.com/wiki/index.php/Jtag