Unified business communication systems offered by devices like smartphones and PDAs are changing the way many business executives conduct their operations.

A new survey of 2,200 business managers conducted by communications firm Avaya found that advances in remote working technology has vastly changed how many executives work - with 44 per cent of top CEOs admitting they often take calls at home while still wearing their pyjamas.

The survey also found that 63 per cent of smartphone users had continued sending emails under their desks during the middle of a meeting as the drive for non-stop business communication continues.

"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 for Avaya in Europe, the Middle East and Africa.

"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 business opportunities aren't missed, while enjoying the benefits of flexible working."

According to recent survey by Connect, the two biggest IT headaches for businesses were 'everyday hassles with IT' (37 per cent) and 'security concerns' (32 per cent)