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How to Set Up a TransPort with a Gobi 2000/3000 for use with AT&T

Information You will Need
Before you attempt to set up your Transport for mobile connection, you will need the following items from AT&T:
  • The assigned APN (Access Point Name)
  • PIN Number for your SIM card, if AT&T explicitly says it is required
  • Username and Password, if AT&T explicitly says it is required
 
For the WR41 & WR44
W-WAN NET
Will illuminate steady if the unit is able to log on to the AT&T mobile network.

W-WAN SIM
This LED should illuminate green if a SIM card is present.

W-WAN DAT
Represents data passing to and from the network.

Signal Strength
Here is a guide for the signal strength:
  • -113 dBm or less (0 LED) -> effectively no signal
  • -112 dBm to –87 dBm (1 LED) -> weak signal
  • -86 dBm to –71 dBm (2 LEDs) -> medium strength signal
  • -70 dBm or greater (3 LEDs) -> strong signal
The minimum recommended strength indication is 2 LEDs. If you have no or 1 LEDs lit, it is recommended that you fit an external antenna to the unit.
 
For the WR21
Service
Illuminates steady when there is a network connection to the WWAN interface and flashes when data is transmitted or received.

WWAN
Flashes to show which network mode the unit is operating in:
  • Off - no service
  • 1 blink - GPRS mode
  • 2 blinks - EDGE mode
  • 3 blinks - UMTS mode
  • 4 blinks - HSDPA mode
  • 5 blinks - HSUPA mode
  • On steady - CDMA mode
Signal Strength
Here is a guide for the signal strength:
  • -113 dBm or less (0 LED) -> effectively no signal
  • -112 dBm to –87 dBm (1 LED) -> weak signal
  • -86 dBm to –71 dBm (2 LEDs) -> medium strength signal
  • -70 dBm or greater (3 LEDs) -> strong signal
The minimum recommended strength indication is 2 LEDs. If you have no or 1 LEDs lit, it is recommended that you fit an external antenna to the unit.
 
 
 
 
Locating the Mobile IP Address
 
  1. On the Home page, you should see the Mobile IP address under PPP1 (W-WAN (CDMA)).
 
 User-added image
 
  1. Under Management > Network Status > Interfaces > Mobile
 User-added image
 Mobile Connection  
 
Registration Status
The GSM registration status of the mobile module with respect to the GSM network. It may be one of the following
  • Not Registered, not searching
  • Not registered, searching
  • Registered, home network – Note that this is ideal
  • Registered, roaming
  • Registration denied
  • Unknown
  • ERROR
The registration status may sometimes be followed by additional information about the Location Area Code (LAC) and the Cell Identifier (CI).

Signal Strength
The signal strength in dBm being received by the mobile module.
Here is a guide for the signal strength:
  • -113 dBm or less (0 LED) -> effectively no signal
  • -112 dBm to –87 dBm (1 LED) -> weak signal
  • -86 dBm to –71 dBm (2 LEDs) -> medium strength signal
  • -70 dBm or greater (3 LEDs) -> strong signal
The minimum recommended strength indication is 2 LEDs. If you have no or 1 LEDs lit, it is recommended that you fit a high-gain external antenna to the unit.For GSM networks, the Mobile Information section can have the following items.
 
SIM Status
This indicates whether or not a valid SIM card has been installed in the router. It may be one of the following
  • READY - SIM is OK
  • SIM PIN - PIN number required
  • SIM PUK - SIM blocked (unblocking code required)
  • ERROR - SIM is not installed or is faulty
 
Radio Technology
The current network technology in use. It may be one of the following
  • GSM
  • GPRS
  • EDGE
  • UMTS
  • HSDPA
  • HSUPA
  • CDMA 
 
Manufacturer
The manufacturer of the mobile module.  For a Gobi module, you should see either Huawei Incorporated or Huawei EM680, Qualcomm Gobi 2000, Qualcomm Gobi 3000.
 
IMEI
The International Mobile Equipment Identification (IMEI) of the mobile module.
 
ESN
The Electronic Serial Number (ESN) of the mobile module.
 
MEID
The Mobile Equipment Identifier (MEID) of the mobile module.
 
IMSI
The International Mobile Subscriber Identity (IMSI) of the mobile module.
 
ICCID
The Integrated Circuit Card Identifier (ICCID) of the SIM card.
 
Firmware
The firmware running on mobile module.
 
Bootcode
The bootcode firmware running on the mobile module.
 
Hardware Version
The hardware version of the mobile module.
  
GPRS Attachment Status
The current status of the mobile module with respect to the Mobile service. It may be one of the following
  • Not attached - the unit has not connected to a mobile service.
  • Attached - the unit has connector to a mobile service.
  • ERROR - unknown response from the mobile module.
 
GPRS Registration
See Registration Status under Mobile Connection.
 
Network
The name of the GSM network to which the mobile module is currently connected to or ERROR if no network is available.  The numbers at the end is the Mobile Country Code (MCC)/Mobile Network Code (MNC).
 
Preferred system
The preferred technology. It can be one of following
  • Auto
  • GSM only
  • WCDMA only
 
Raising and Lowering the Cellular Link
  • Under Management > Connections > PPP Connections > PPP 1 – W-WAN, you should see the Mobile IP Address, the Primary and Secondary DNS Address, as well as buttons to Drop or Raise the link. 

User-added image 
 

Ping Test
 
Go to Administration > Execute a command.  Enter ping followed by a hostname or IP address and then click Execute.
 
For example:  ping www.digi.com

  1. If the result is good, you will see the response time as well as Success of 100%. 
  2. If the result says ‘unable to resolve <hostname>’, then something is wrong with the DNS primary and secondary addresses.  Please look under Management > Connections > PPP Connections > PPP 1 – W-WAN to verify you have a primary and secondary DNS address.
  3. You should also try to ping a working, public IP address instead of a hostname.  For example: ping 66.77.174.59
  4. If this result is good (see above for a good response), then again there is something wrong with the primary and secondary DNS addresses.
  5. If the result fails, you will see ‘no response from <ip address>’.  Please verify you have a mobile IP address by going to Management > Connections > PPP Connections > PPP 1 – W-WAN.
  6. If you do not have an IP address, please email Digi Technical Support with the debug.txt file (please see “When contacting Digi Technical Support” below).
  7. If you do have a mobile IP address, but cannot ping to a valid, public IP address, please verify with the provider if you have a public or private mobile IP address.

 
 Troubleshooting
Ensure you are on the latest firmware
Updating your firmware may resolve your issue as well as enhancements to both your Transport and traces for troubleshooting.

  1. To check your firmware, go to Administration > System Information and note your Firmware Version
  2. Compare the firmware version to our latest release by going to www.digi.com > Support > Firmware Updates
  3. Enter your Transport Model (i.e. WR21) in the field and then click on your particular model
  4. It should bring you to a page for your product. Choose the fimrware for the type of upgrade you will performing, either via FTP (WebUI) or FlashWriter, from the options on the page and save the file to your PC.
  5. Please follow “TransPort Firmware Upgrade Instructions” that is available under the General Firmware page listed above.
 
http://ftp1.digi.com/support/documentation/QN_024_Extracting%20the%20debug.txt%20file%20from%20a%20Digi%20TransPort%20or%20Sarian%20router.pdf.
Last updated: Feb 27, 2019

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