Possible Clues:

• Stop talking, in a way
• Emotional inhibition? Replace telephone
• In slang, an emotional inhibition - suspend it
• Having a thing about, refuse to talk to any more
• Unhealthy preoccupation, obsession
• An emotional problem or inhibition - suspend it
• Modern term for emotional inhibition - get off the phone
• Obsession to get off the line
• Psychologically problematic conclusion to phone call?
• Stop talking and die - not in bed