Cellular enabled console server

[uwcableguy at gmail.com (Ben Bartsch)]

NANOG - Are any of you running a console server to access your network
equipment via a serial connection at a remote site?  If so, what are you
using and how much do you like it?  I have a project where I need to stand
up over 100 remote sites and would like a backdoor to the console just to
be able to see what's going on with the equipment to hopefully avoid a
truck roll for something simple like a hung device.  I need 4 console ports
and 1 RJ45 ethernet jack.  My quick Google search landed me at
BlackBox LES1204A-3G-R2, but I've never actually used such a device.  This
would be for use in the USA.

Thank you in advance.

-ben