Enables operators to offer business customers a "virtual" fixed-line - with cost benefits, when using mobiles within the office. Also known as: Office zone, Work zone
Enterprises can define one (or more) geographic 'business zones' such as main offices and satellite offices, and each employee's mobile is associated with a virtual office phone number. If configured only for internal calls the virtual number will be the effective extension (EXTN) number. If configured for external calls, the virtual number will be the effective DDI number.
Inside the business zone: When the employee makes a call, their phones MSISDN is replaced with their virtual number, and reduced call charges apply. Calls made to their virtual number are routed to their mobile.
Outside the business zone: The employee's original MSISDN is used for outbound and inbound calls (and normal mobile charges apply). However, depending on system configuration, they may still be able to receive calls made to their virtual number (alternatively these may be handled differently - e.g. Using their business voicemail).
Benefits for the Network Operator