
Some 51 percent have participated in a conference call wearing only a bathrobe - or less.
"Most workers rely on communications technology during their working day, and the ability to access information remotely has an obvious appeal," said Ian Groves, director of unified communications applications at Avaya.
"Multiple communication technologies can result in too many messages in too many places. It can be a virtual chaos.
"Our survey reveals that smartphone users, and particularly senior level employees, are taking advantage of unified communications to ensure that business opportunities aren't missed, while enjoying the benefits of flexible working."
Nearly two thirds of smartphone users use their devices during meetings to communicate, and nearly half refuse to take videoconferencing calls because they are inappropriately dressed.
Senior managers are much more relaxed about matters than their junior counterparts. Some 17 percent of senior vice presidents will sleep during conference calls compared with five per cent of more junior staff.