電話がなっているのが聞こえた。

telephone call; phone call; telephone (device); phone

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

to be heard; to be audible; to be said to be; to be reputed