Entering the conversation in ringing tones? (7,2)

I believe the answer is:

chiming in

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'entering the conversation' is the definition.
The answer and definition can be both to do with communicating as well as being present participle verbs.
Perhaps you can see an association between them that I don't see?

'ringing tones?' is the wordplay.
'ringing' becomes 'chiming' (I've seen this before).
'tones?' becomes 'in' (I am not sure about this - if you are sure you should believe this answer much more).
'chiming'+'in'='CHIMING IN'

'in' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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