4 ms·

We have used a similar dongle at our company for a 2nd ethernet adapter on our Foxconn-built boxes and found out that they usually don't have unique MAC address

by gresrun 13y ago

We have used a similar dongle at our company for a 2nd ethernet adapter on our Foxconn-built boxes and found out that they usually don't have unique MAC addresses. This made our lives very difficult because Cobranet audio network uses level-2 addressing. We eventually found a supplier with real MAC addresses.

nitrogen 13y ago
Were you able to get reliable performance sending CobraNet over USB Ethernet adapters? I once wrote a simple audio recording program for the Linux console for diagnosing CobraNet issues, but haven't tried it over a USB adapter.
- gresrun 13y ago
  Yeah, we still use them. They work without any problems on Ubuntu.
  - nitrogen 13y ago
    It's a shame this thread about CobraNet was lost in the HN crash over the weekend.
userbinator 13y ago
You know it is usually pretty trivial to assign whatever MAC you want to them. (I have an unbranded Android phone that assigns a random MAC address every time I turn WiFi on/off. Apparently this happens since they didn't bother to initialise the EEPROM and just left it at all zeroes. But this means being harder to track, so I consider it more a feature than a bug...)
- rahimnathwani 13y ago
  Does it have a legit IMEI? I've read about phones with IMEI set to all zeroes and/or configurable in a secret menu. What model is the phone?
  - rahimnathwani 13y ago
    To clarify, my interest in whether the IMEI is zeroed and/or programmable is about how the various mobile networks use IMEI, particularly: - China Unicom uses them to detect continued use of subsidized handsets on their network (and will send the customer a text if they're not using it (eg if they've sold their subsidized phone) - I believe T-mobile USA use IMEI to limit access to their 'free data for life' promotion to specific tablet models - Several UK mobile networks have different data tariffs for phones vs. tablets vs. dongles vs. mi-fi devices I'm wondering whether there is any/widespread use of these android devices to bypass restrictions and, eg use a cheaper tablet data plan on a mobile phone with tethering to multiple devices.

by gresrun 13y ago

nitrogen 13y ago

Were you able to get reliable performance sending CobraNet over USB Ethernet adapters? I once wrote a simple audio recording program for the Linux console for diagnosing CobraNet issues, but haven't tried it over a USB adapter.

gresrun 13y ago
Yeah, we still use them. They work without any problems on Ubuntu.
- nitrogen 13y ago
  It's a shame this thread about CobraNet was lost in the HN crash over the weekend.

userbinator 13y ago

You know it is usually pretty trivial to assign whatever MAC you want to them. (I have an unbranded Android phone that assigns a random MAC address every time I turn WiFi on/off. Apparently this happens since they didn't bother to initialise the EEPROM and just left it at all zeroes. But this means being harder to track, so I consider it more a feature than a bug...)

rahimnathwani 13y ago
Does it have a legit IMEI? I've read about phones with IMEI set to all zeroes and/or configurable in a secret menu. What model is the phone?
- rahimnathwani 13y ago
  To clarify, my interest in whether the IMEI is zeroed and/or programmable is about how the various mobile networks use IMEI, particularly: - China Unicom uses them to detect continued use of subsidized handsets on their network (and will send the customer a text if they're not using it (eg if they've sold their subsidized phone) - I believe T-mobile USA use IMEI to limit access to their 'free data for life' promotion to specific tablet models - Several UK mobile networks have different data tariffs for phones vs. tablets vs. dongles vs. mi-fi devices I'm wondering whether there is any/widespread use of these android devices to bypass restrictions and, eg use a cheaper tablet data plan on a mobile phone with tethering to multiple devices.