An on-call room is a room in a hospital

Hospital

A hospital is a health care institution providing patient treatment by specialized staff and equipment. Hospitals often, but not always, provide for inpatient care or longer-term patient stays....

 with either a couch

Couch

A couch, also called a sofa, is an item of furniture designed to seat more than one person, and providing support for the back and arms. Typically, it will have an armrest on either side. In homes couches are normally found in the family room, living room, den or the lounge...

 or a bunkbed intended for staff to rest in while they are on call or due to be.

In the European Community, the 2003 extension of the working time directive to junior doctor

Junior doctor

Junior doctors in the United Kingdom and the Republic of Ireland are those in postgraduate training, starting at graduation with a medical degree and culminating in a post as a Consultant, a General Practitioner, or some other non-training post, such as a Staff grade or Associate Specialist...

s and the ruling that on-call time counts as working hours has resulted in the introduction of shift working for hospital medical staff, thereby eliminating the requirements for on-call rooms.