Yep, not everyone in the squad under MG fire might be that keen to listen to that *** Bn Commander shouting at them through PL leader's radio to charge
Btw toying in an experimental scen with using comms for artillery management, so that say mortars attached to support a company have no radio and can be called only by the given company (granted they maintain contact with Coy commander).
or that a howitzer battery (on board) has to have contact with bty commander or else FOs cannot direct them.