M.L. wrote:

Wi-fi "working" could mean lots of different things. For example, maybe
the phones can connect via wi-fi to the modem but the users haven't yet
tested that they can actually get an Internet connection (by using a web
browser).
One user absent-mindedly logged into her office remotely and was
connected. That's how they found out they had wireless Internet.
That's her work phone and it doesn't have cellular service.
VOIP service is separate from Internet service. That's why when you
call to report an outage they ask if the other service still works (to
know the physical connections and cabling are still okay).

Unclear if the work phone is a landline phone or a cell phone but with
no cellular service (no voice or data service plan).

It's the latter.

One of my troubleshooting tips was to confirm the expected SSID of the
wireless connection.
While you could dig into the modem's configuration to see, for example,
if the wifi connection was subnetted away from the Internet access (it's
very possible to use subnets within the intranet that grant no WAN-side
access, and the same for the Ethernet wired ports), it would probably be
much easier to reset the modem to its defaults.

Thanks VanguardLH. As always, your reply is thorough and
well-researched. However, at this point we're not trying to fix
anything. Just waiting on AT&T.

I'm just baffled as to how all the smartphones have WiFi even though
the router's Broadband light is flashing red. The Ethernet-connected
desktop is the only one without Internet.


https://www.broadcom.com/products/br...d/xdsl/bcm6362

Single-Chip IAD with Integrated ADSL2+, 802.11n and DECT


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

2x2 802.11n core, which offers best-in-class range and throughput
to support the video, voice and data services that broadband
providers are offering to subscribers

WLAN subsystem includes Accelerange technology

2x2 802.11n radio supports both 2.4 GHz and 5 GHz operation

High performance 400 MHz dual core processor architecture,
hardware-assisted wirespeed bridging and routing, hardware
assisted IPsec security for virtual private network (VPN)
termination, gigabit switching, and support for USB 2.0 host
and devices

CAT-iq DECT core for HD voice, multi-line cordless VoIP and
internet connectivity

https://wikidevi.com/wiki/Motorola_N...nabling_Telnet

Serial output from boot sequence

Light starts blinking red when DoDyingGaspCommand is printed

*******

Maybe the secret is "hardware-assisted wirespeed bridging and routing".
It could be that the MIPS handles setting up new connections in
a table somewhere, but once set up, packets follow the same path
autonomously.

Seems pretty far fetched though - modern Wifi MACs use a processor
and have their own code. There is no indication this product
does that - engineers don't generally waste resources, and
if you wanted a processor for keep-alive on the wifi, the
main processor could run that code quite nicely.

Another possibility is a division of labor. There are two cores.
Perhaps one core can execute a Halt, and the second core keeps
running, and the division of labor is such that lashed up
connections continue to deliver data. Maybe one core is
considered "RT" for the DSP, while the other core runs Linux.

Something has to do DSP for the ADSL. That would use up any where
from half a core to one core of horsepower. And that would run
continuously. I don't see the word DSP in the description (like
a dedicated DSP for just the front end). The serial port log output says

"Allocating memory for DSP module core and initialization code"

which suggests the MIPS32 does the necessary DSP on the digitized
signal from the analog front end.

You could have service, if there was some way for a second
WAN path on the router. I don't know how you'd figure that out
though. What could your Wifi connect to, that would relay packets ?

*******

The four pin serial header would be chassis ground referenced.
The box would normally be "fully floating" except for whatever
earthing was via the ADSL RJ11. If there was a need to run the
serial header while the ADSL was hooked up, if I was doing it
I would look for an optoisolated TX/RX from there to a
USB dongle on my computer. That would be necessary to help
preserve the noise floor on the ADSL2+ connection. The log
on that web page was collected with the ADSL2+ line unplugged
(and just as a means to collect hardware detection info
from inside the box).

Paul