how to know if my call is waiting?

[Asteroid]

is there any seem edit for L7 to enable showing on display if my call is waiting when i call to any person. there's not even any option to show on display if the phone is ringing on another side. all nokia handsets supports these features.
neway i've managed to see if the other phone is ringing by enabling call forwarding so that if the other phone is ringing my display shows "Forwarding On".
but now i need the call waiting indicator, isnt there any way by seem edit or firmware patching?

[manas]

activate call waiting
you will get beeps, if somebody's call is waiting

[Asteroid]

i meant if i'm calling someone and he is already busy talking with other so that my call is waiting on the other side, how can i know if my call is waiting? normally it just ringing sound as usual call. but in nokia handset in the same situation u'll see, "calling.." then "waiting.." on the display. isn't thr neway to have such waiting indication on display in moto? i'm not sure but may b i saw that "waiting" status on display in a c*** series motorola handset cant remember what is the model number though.