How to stop Huawei P9 Lite from constantly beeping when receiving another call while talking?

[AC Question]

So, whenever I talk on my phone and recieve an incoming call, it keeps on beeping while I talk (while the person who calls keeps on calling) and i would like it only to beep for once or twice and then stop. What settings should i change?

 

[Rukbat]

*70 (added in front of the number you're calling) will stop call waiting completely (not even 1 beep) per call in the US. If you want it permanent, call your carrier.

There's no "just 1 or 2 beeps per caller" that I know of. (It's not the phone - the central office sends you the beeps, and the phone just reproduces whatever sound it gets.)