User Tools

Site Tools


venus-os:gx-gsm

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
Last revision Both sides next revision
venus-os:gx-gsm [2019-10-03 22:01]
krenzke Line break added to prevent clipping
venus-os:gx-gsm [2020-01-18 11:23]
mvader [7. Supported Frequencies (2G/3G)]
Line 100: Line 100:
 | SIM wrong | Type of SIM is not supported |  | SIM wrong | Type of SIM is not supported | 
  
-===== 6. Trouble shooting =====+[[http://example.com|External Link]]===== 6. Trouble shooting =====
  
-Whilst usually working well, in case the modem does not connect to the internet it can one of many reasons. Carefully go through each step of this trouble shooting guide, starting at the first.+There are many reasons for modem internet connection to not work. Carefully go through each step of this trouble shooting guide. Make sure to start at the first step. When asking for help, make sure to mention each step taken and the result.
  
 ^ Step   ^^ Details                                   ^ ^ Step   ^^ Details                                   ^
-| 1 | Check power  | Check that the blue LED is either lit continuous or blinking +| 1 | Power  | Check that the blue LED is either lit continuous or blinking 
-| 2 | Check USB connection   | The modem must be connected to USB, and visible in the Settings -> GSM modem menu |+| 2 | USB connection   | The modem must be connected to USB, and visible in the Settings -> GSM modem menu |
 | 3 | Simcard status | Check the SIM Status in the menu, it must show "Ready". It will show "SIM not inserted", or "PIN required", or "PUK required" and more related errors when there is a problem. Please refer to the [[venus-os:gx-gsm#sim_status|SIM Status list]] for details. | | 3 | Simcard status | Check the SIM Status in the menu, it must show "Ready". It will show "SIM not inserted", or "PIN required", or "PUK required" and more related errors when there is a problem. Please refer to the [[venus-os:gx-gsm#sim_status|SIM Status list]] for details. |
 | 4 | Signal strength | 1 bar minimum for VRM logging, 2 or 3 bars are necessary for a working remote console | | 4 | Signal strength | 1 bar minimum for VRM logging, 2 or 3 bars are necessary for a working remote console |
Line 115: Line 115:
 An [[venus-os:gx-gsm#accessory_antennas|outdoor antenna]] typically increases received signal by 15 dB to 25 dB. An [[venus-os:gx-gsm#accessory_antennas|outdoor antenna]] typically increases received signal by 15 dB to 25 dB.
  
-Note that when the GX Device is already connected to Ethernet or WiFi, these have priority over the cellular connection. Even when the available Ethernet  or WiFi connection does **not** have a good connection to the internet. There is **no** automatic detection in place which in such case switches over to the GX GSM. In more technical language: when the cellular data connection is active, it is configured with a high routing metric. This way, the Linux kernel prioritises Ethernet or Wifi when these are available.+Note that Ethernet and WiFi connections have priority over the cellular connection. Even when the available Ethernet  or WiFi connection does **not** have a good connection to the internet. There is **no** automatic detection in place which in such case switches over to the GX GSM. In more technical language: when the cellular data connection is active, it is configured with a high routing metric. This way, the Linux kernel prioritises Ethernet or Wifi when these are available.
  
 This screenshot shows how all details look when everything is OK: This screenshot shows how all details look when everything is OK:
Line 122: Line 122:
 ===== 7. Supported Frequencies (2G/3G) ===== ===== 7. Supported Frequencies (2G/3G) =====
  
 +GX GSM, part number GSM100100100:
   * 2G (GSM/GPRS/EDGE): 850/900/1800/1900 MHz (Quad-Band)   * 2G (GSM/GPRS/EDGE): 850/900/1800/1900 MHz (Quad-Band)
   * 3G (UMTS/HSPA+): 900/2100 MHz (Dual-Band)   * 3G (UMTS/HSPA+): 900/2100 MHz (Dual-Band)
 +  * The used module is a Simcom SIM5360E.
 +
 +A second model is coming, expected in 2020 Q3, having below frequencies, suitable for the common networks in Mexico, USA & Canada as well as various countries in Southern America.
 +
 +  * 2G (GSM/GPRS/EDGE): 850/900/1800/1900 MHz (Quad-Band) - same between both models.
 +  * 3G (UMTS/HSPA+): 850/1900 MHz (Dual-Band)
 +  * This new product will be based on the Simcom SIM5360A.
  
 ==== Regional Coverage Information ==== ==== Regional Coverage Information ====
  
-Northern America: 1900 MHz is the most common frequency for 3G, which is unsupported for the current version of GX GSM.+USA, Mexico, Canada and most of South America: 1900 MHz is the most common frequency for 3G, which is unsupported for the current version of GX GSM. But a second model is coming in 2020, see above.
  
 Australia: The 900MHz 3G frequency in remote areas is typically provided by Optus. Telstra's rural 3G network operates at 850MHz which is not supported with the current version of GX GSM. Both Telstra and Optus operate 2100Mhz networks in urban areas, and are supported. Australia: The 900MHz 3G frequency in remote areas is typically provided by Optus. Telstra's rural 3G network operates at 850MHz which is not supported with the current version of GX GSM. Both Telstra and Optus operate 2100Mhz networks in urban areas, and are supported.
venus-os/gx-gsm.txt · Last modified: 2020-06-24 13:53 by mvader