Office layout designs should provide an environment suitable for the business needs of the organisation. For example: call centres undertake their business ‘on screen’ and require small desk areas per staff member, minimum document storage, and may have limited requirements for photocopying facilities and printing. In contrast, companies handling paper based documentation will require larger desks for their staff, storage for records, archive facilities, photocopying and printing facilities close to hand. Each desk in an office may require a telephone and computer. In large offices the power and data cables may be run under a raised floor to the desk. Another alternative in smaller offices is to use dado trunking around the wall. Other alternatives are to use ceiling power poles which can assist space planning of desks away from perimeter walls.