Suspended, in a way

• Hearing "Your call is important to us" over and over ...
• Stuck waiting during a phone call: 2 wds
• Waiting, phone in hand
• Hearing music on the phone, perhaps
• Waiting for a phone rep, maybe
• Shelved for now
• Listening to bad music, perhaps
• Having to wait
• Listening to music, perhaps

Wiktionary Word definitions in Wiktionary
vb. 1 (context transitive rare English) To hold on (to). 2 (context intransitive rare English) To hold on.