This read-only integer reports an internal Automatic Frequency Control value from the terminal's modem, described as an implementation-specific figure intended mainly for vendor diagnostic use. A support engineer might request this value when working a hard-to-diagnose link issue with Codan support, rather than an operator using it for routine day-to-day monitoring. For example, a vendor technical support case investigating unexplained sync loss might ask for the current wvModemAfc reading alongside other diagnostic counters.