BT this week launched a service offering business customers a single phone for use inside and outside the office.
But despite the service's name - Corporate Onephone - a single handset for all business and personal phone calls is still a pipe dream for most.
Corporate Onephone, targeted at companies with more than 120 users, functions as a Digital Enhanced Cordless Telephony (DECT) phone inside the office and a GSM mobile phone outside the office.
To use the phone as a DECT phone inside the office, users require a base station in the office to pick up their phone signal and connect their call to the company's switchboard. Calls can then be directed to another extension, or to an external line.
Users pay their normal fixed line fee for external calls made from the office, or regular mobile charges for calls made on the road.
BT Cellnet launched a version of Onephone for the consumer market last month, encouraging customers to ditch their mobile and landline handsets and switch to a single device.
However, there is no interoperability between the corporate and consumer devices, so for enthusiastic customers who want to use the system at home and at work, Onephone remains two phones for now.
"With the current Onephone, you can't use the Corporate Onephone in your home as anything other than a GSM phone," said Peter Richardson, director of corporate mobile solutions at BT. "Downstream we may try to combine the two."
BT currently offers a service called Mobile Extension where a private circuit links a company's switchboard directly into the BT Cellnet network allowing savings on call charges from office to mobiles or mobiles to office.
To comment on this story, email [email protected]
Climate change likely forced inhabitants of Indus Valley civilisation to resettle in the Himalayan foothills
Shift in weather patterns made agriculture almost impossible in the Indus Valley region
Researchers claim that the magnetic properties of a thin-film material can be controlled by applying a small voltage
Dubbed Antlia 2, the ghost galaxy sits just 130,000 light-years away from the Milky Way
Delays to the roll-out of age verification for adult websites hasn't stopped government from considering extending them to more websites