GL7500 Data modem setup

IoT Gateways GL Series
1

Hello, I’m new using these devices and I’m looking to do what I thought would be a simple embedded modem to connect to the internet.

I’m using this device to replace an older USB cell modem from AT&T, which was connected into the usb on a wireless router. Most carrier usb modems don’t offer external antenna setups, which is why I picked this up.

Currently I’m just connecting the GL7500 to my laptop for initial testing. I have a data only sim card from Verizon, which has been tested in other modems and works just fine.

Thus far I have done:

  • Downloaded and installed USB drivers
  • supplied the device with 6v power
  • Connected usb cable from Laptop to device
    *LED light is blinking at the slow flash rate
    - indicates that its registered in the network.
  • Connected to device via Putty
  • AT commands work just fine.
    - AT
    >OK
    - AT+CPIN?
    > +CPIN: READY
    - AT+CSQ
    > +CSQ: 15, 5 Received signal strength appears to be good
    - AT+CREG?
    > +CREG: 0, 3 This doesn’t appear to be a response in the manual.
    so I downloaded airprime HL7588 AT Commands Interface Guide
    Found that 0, 3 indicates Registration denied.

Any insight as to what steps I should take next to resolve this? Is it possible that Verizon has blocked my device itself? which is why registration has been denied?

3

I have the same issue. I contacted Verizon support who was of no help. They were able to see the sim card and modem online but could offer no explanation as to why it is getting denied. Have you had any more success?

4

Hi,

Have you resolved the issue? First please install the right FW to your modem, it should be firmware with VZW name: https://source.sierrawireless.com/resources/airprime/software/hl7588-firmware/#sthash.kQH6Bdor.dpbs

Then try to configure PDP context 3 by: AT+CGDCONT=3,“IP”,“vzwinternet” and reset the modem.