| Firmware is required for this device: http://accessrunner.sourceforge.net/ |
| |
| While it is capable of managing/maintaining the ADSL connection without the |
| module loaded, the device will sometimes stop responding after unloading the |
| driver and it is necessary to unplug/remove power to the device to fix this. |
| |
| Detected devices will appear as ATM devices named "cxacru". In /sys/class/atm/ |
| these are directories named cxacruN where N is the device number. A symlink |
| named device points to the USB interface device's directory which contains |
| several sysfs attribute files for retrieving device statistics: |
| |
| * adsl_controller_version |
| |
| * adsl_headend |
| * adsl_headend_environment |
| Information about the remote headend. |
| |
| * downstream_attenuation (dB) |
| * downstream_bits_per_frame |
| * downstream_rate (kbps) |
| * downstream_snr_margin (dB) |
| Downstream stats. |
| |
| * upstream_attenuation (dB) |
| * upstream_bits_per_frame |
| * upstream_rate (kbps) |
| * upstream_snr_margin (dB) |
| * transmitter_power (dBm/Hz) |
| Upstream stats. |
| |
| * downstream_crc_errors |
| * downstream_fec_errors |
| * downstream_hec_errors |
| * upstream_crc_errors |
| * upstream_fec_errors |
| * upstream_hec_errors |
| Error counts. |
| |
| * line_startable |
| Indicates that ADSL support on the device |
| is/can be enabled, see adsl_start. |
| |
| * line_status |
| "initialising" |
| "down" |
| "attempting to activate" |
| "training" |
| "channel analysis" |
| "exchange" |
| "waiting" |
| "up" |
| |
| Changes between "down" and "attempting to activate" |
| if there is no signal. |
| |
| * link_status |
| "not connected" |
| "connected" |
| "lost" |
| |
| * mac_address |
| |
| * modulation |
| "ANSI T1.413" |
| "ITU-T G.992.1 (G.DMT)" |
| "ITU-T G.992.2 (G.LITE)" |
| |
| * startup_attempts |
| Count of total attempts to initialise ADSL. |
| |
| To enable/disable ADSL, the following can be written to the adsl_state file: |
| "start" |
| "stop |
| "restart" (stops, waits 1.5s, then starts) |
| "poll" (used to resume status polling if it was disabled due to failure) |
| |
| Changes in adsl/line state are reported via kernel log messages: |
| [4942145.150704] ATM dev 0: ADSL state: running |
| [4942243.663766] ATM dev 0: ADSL line: down |
| [4942249.665075] ATM dev 0: ADSL line: attempting to activate |
| [4942253.654954] ATM dev 0: ADSL line: training |
| [4942255.666387] ATM dev 0: ADSL line: channel analysis |
| [4942259.656262] ATM dev 0: ADSL line: exchange |
| [2635357.696901] ATM dev 0: ADSL line: up (8128 kb/s down | 832 kb/s up) |