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Digi TransPort
®
WR21 Installation Guide
Page 7
2.1 Front Panel Features
1. SIM/R-UIM Sockets (SIM card models only) - SIM 1 and SIM 2 are for use with the Subscriber
Identication Module(s) (SIMs) or Removable User Identication Module(s) (R-UIMs).
2. LED Status Indicator - POWER - Illuminates steady when power is connected.
3. LED Status Indicator - SERVICE - Illuminates steady when there is a network connection to the WWAN
interface and ashes when data is transmitted or received.
4. LED Status Indicator - WWAN (Wireless Network) - 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
5. LED Status Indicator - SIGNAL.
• 0 LEDs illuminated: < -113 dBm (effectively no signal)
• 1 LED illuminated: >= -112 dBm and <= -87 dBm (weak)
• 2 LEDs illuminated: >= -86 dBm and <= -71 dBm (medium)
• 3 LEDs illuminated: >= -70 dBm and <= -51 dBm (strong)
6. USB Host Connector - The USB host connector may be used to connect compatible USB 2.0 client
devices such as memory sticks, and serial adapters. The total current available to power USB devices is
0.5A.
7. Reset button - The reset button allows the user to return the unit to its factory default settings.
2.1.1 Reset instructions
Step 1) Turn the unit on and wait 15 seconds for the unit to complete its initialization process.
Step 2) Press and hold the reset button gently for 5 seconds. After this time, the unit will automatically re-boot
and display a pattern of alternating LEDs ashing followed by the normal boot sequence.
Note: Do not remove power from the unit during this operation as corruption of the ash memory may occur.