SSH server for authenticated remote shell access to the device, using the russh crate. Supports password and public key authentication with PTY allocation for interactive shells and exec requests for one-shot commands.
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│ Dedicated OS thread ("ssh-server") │
│ Own tokio current_thread runtime │
How to switch the Orbic RC400L between carriers using only a root shell and AT commands. No custom firmware required — just the stock device with root access.
The Orbic RC400L ships with Verizon/Kajeet PDP context profiles baked in. When you insert a different carrier's SIM (T-Mobile, AT&T, etc.), the modem detects the new network but the old APN configurations remain, preventing a data connection. You must manually delete the old PDP contexts, configure new ones, update the QCMAP config file, and reboot.
Why AT+CGACT doesn't work: The stock QCMAP_ConnectionManager daemon owns the data call. Attempting AT+CGACT=1,<cid> returns +CME ERROR: unknown. Instead, we configure the APN at both the AT command level and in QCMAP's config file, then reboot to let QCMAP establish the connection cleanly.