Waiting for a phone rep, maybe

• Waiting to speak to someone, perhaps
• Hearing music on the phone, perhaps
• Not progressing
• Working hard earlier, temporarily delayed
• Waiting for a phone agent
• Listening to Muzak, maybe?
• Shelved for now
• Hearing "Your call is important to us" over and over ...
• Listening to cheesy music, maybe

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