Black Box LES1308A, LES1332A, LES1408A Verify cellular connection, Cellular modem watchdog

Navigate to the Internal Cellular Modem tab on System: Dial. To connect to your carriers 3G network enter the appropriate phone number (usually #777) and a Username and Password if directed to by your account/plan documentation

Select Enable and then click Apply to initiate the Always On Out-of-Bandconnection

5.6.3Verify cellular connection

Out-of-band access is enabled by default so the cellular modem connection should now be on.

You can verify the connection status from the Status: Statistics

o Select the Cellular tab and in Service Availability verify Mode is set to Online o Select Failover& Out-of-Bandand the Connection Status reads Connected o You can check your allocated IP address

You can measure the received signal strength from the Cellular Statistics page on the Status: Statistics screen. This will display the current state of the cellular modem including the Received Signal Strength Indicator (RSSI)

Note: Received Signal Strength Indicator (RSSI) is a measurement of the Radio Frequency (RF) power present in a received radio signal at the mobile device. It is generally expressed in dBm and the best throughput comes from placing the device in an area with the highest RSSI.

-100 dbm or less = Unacceptable coverage -99 dbm to –90 dbm = Weak Coverage

-89 dbm to – 70 dbm = Medium to High Coverage -69 dbm or greater = Strong Coverage

With the cellular modem connection on you can also see the connection status from the LEDs on top of unit

5.6.4Cellular modem watchdog

When you select Enable Dial-Outon the System: Dial menu you will be given the option to configure a cellar modem watchdog service (with firmware V3.5.2u13 and later). This service will periodically ping a configurable IP address. If a threshold number of consecutive attempts fail, the service will cause the unit to reboot. This can be used to force a clean restart of the modem and its services to work around any carrier issues.

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