A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private branch.

Charges for PABX as follows:

• Monthly charges for fixed line - $390 ($13 x 30 channel)
• Monthly charges for 2Mbps access - $1,800
• Installation charges - $800
• Monthly charges for DID number (per number) - $2.00