Phone repair. I am not sure what the model number is on my Radio Shack cordless phone, but the

Question

I am not sure what the model number is on my Radio Shack cordless phone, but the keypad Talk and numbers only work when the dial tone is not on, but when I press Talk the dial tone does not work and the keypad is dead even though the Memory key and Caller ID key still function but do not dial. Can you help me figure this out?