What if the case is an emergency case on the telephone such as a mother on the phone giving a scenario of possible foreign body aspiration by her child! Can we instruct her to do life saving measures at home!
Oh yes in that case you may advise her to do life saving measure if she's telling you that her child is now gasping and cannot breath and has turned blue.
Even if the child is not so immediately in danger you should to advise her to contact 911 immediately if she noticed any abnormal breathing or cyanosis.
Otherwise, specific therapy for non emergency telephone cases is better avoided. Like you may not tell her to expose her jaundiced baby to the sun in an effort to minimize the effects of hyperbilirubinemia. In such a case the most important advise is that you insist on bringing her child to the hospital for complete assessment.