No, each Grandstream device must have its own configuration file. It has the device identification burned in. This is a security measure to make sure the configuration file is really intended for the receiving device.
. Turn on "Lock Keypad Update" (P88) to prevent users from doing a factory reset via IVR. 2. Change Admin password (P2) to prevent access to ADVANCED settings web UI. 3. Add a P1 value in configuration files so that devices only take configuration files with a matching password.