Which dip switch on the site controller must be toggled to grant remote access to the Verifone Helpdesk?

To grant remote access to the Verifone Helpdesk, the LOGIN dip switch on the site controller must be toggled. This switch is specifically designed to control the ability of external support personnel to access the device remotely for troubleshooting and maintenance purposes. By enabling this switch, it allows authorized helpdesk staff to connect to the system, ensuring they can efficiently resolve any issues that arise without needing to be physically present at the site.

The other dip switches have different functions. For instance, the DIAG switch may be associated with diagnostic modes or tests, while SP1 and SP2 typically control specific service panels or special functions that do not pertain to granting remote access. Hence, the LOGIN dip switch is the correct option to enable remote assistance when required.