Cellular Modems continuously disconnecting


#1

Hello all,
I have been experiencing cellular disconnects for the past couple of weeks.

Additionally, the temperature constantly shows 500C/932F, but the unit is barely warm…

Event log follows;

Nov 09 10:49:56 WAN: Wi-Fi WAN connected to Blah (192.168.1.196)
Nov 09 10:49:56 WAN: Cellular 4 disconnected in SIM slot A
Nov 09 10:49:56 WAN: Cellular 3 disconnected in SIM slot A
Nov 09 10:49:56 WAN: Cellular 2 disconnected in SIM slot A
Nov 09 10:49:41 WAN: Cellular 2 connected to T-Mobile (26.123.108.39) in SIM slot A
Nov 09 10:49:39 WAN: Cellular 3 connected to AT&T (10.173.148.17) in SIM slot A
Nov 09 10:47:43 WAN: Wi-Fi WAN standby (192.168.1.196)
Nov 09 10:47:43 WAN: Cellular 4 connected to VzW (100.88.67.240) in SIM slot A
Nov 09 10:47:39 WAN: Wi-Fi WAN connected to Blah (192.168.1.196)
Nov 09 10:47:39 WAN: Cellular 4 disconnected in SIM slot A
Nov 09 10:47:36 WAN: Wi-Fi WAN standby (192.168.1.196)
Nov 09 10:47:36 WAN: Cellular 4 connected to VzW (100.88.67.240) in SIM slot A
Nov 09 10:46:45 WAN: Wi-Fi WAN connected to Blah (192.168.1.196)
Nov 09 10:46:45 WAN: Cellular 4 disconnected in SIM slot A
Nov 09 10:46:36 WAN: Wi-Fi WAN standby (192.168.1.196)
Nov 09 10:46:36 WAN: Cellular 4 connected to VzW (100.87.206.58) in SIM slot A
Nov 09 10:46:32 WAN: Wi-Fi WAN connected to Blah (192.168.1.196)
Nov 09 10:46:32 WAN: Cellular 4 disconnected in SIM slot A
Nov 09 10:46:29 WAN: Wi-Fi WAN standby (192.168.1.196)
Nov 09 10:46:29 WAN: Cellular 4 connected to VzW (100.87.206.58) in SIM slot A

Thank you so much for any assistance or ideas!


#2

@trevorwilliams

There are two problem mentioned for you:

  1. Cellular WAN randomly disconnected
  2. Device showing high temperature

May i know how the device being power up ? You are saying the temperature constantly shows high. Do you reboot before the device ? After reboot will it clear the state ?


#3

Rebooting cleared the high temp state. But the cellular still is disconnecting.

Trevor


#4

@trevorwilliams

May i know how the device being power up ? Using default shipped power adapter ? We need to isolate whether this cause by power issue.

If you check the logs given above:

Nov 09 10:49:56 WAN: Wi-Fi WAN connected to Blah (192.168.1.196)
Nov 09 10:49:56 WAN: Cellular 4 disconnected in SIM slot A
Nov 09 10:49:56 WAN: Cellular 3 disconnected in SIM slot A
Nov 09 10:49:56 WAN: Cellular 2 disconnected in SIM slot A

The disconnection seem abnormal


#5

Device is powered by 12VDC on terminal block.

Trevor


#6

What is the ampere (A) for the DC power input (terminal block) ?


#7

2.4A @ 12VDC.

Trevor


#8

@trevorwilliams

Look like you have insufficient power for the HD4 device.

Please check the power consumption requirements for HD4 using the following URL:

image

You need 4A for the current in-order to give the sufficient power for the HD4 device.


#9

The current consumption was 2.4A, there is a 5A fuse installed with 14AWG wire on the terminal power supply.


#10

@trevorwilliams

Do you mean you have DC power input 12V, 5A for the HD4 device ? Base on the power measurement tools that you have, HD4 is currently drawing 2.4A from the power source ?

If the above is correct, please open a support team for support team to check.