eral systems, other companies specialize in the pe- ripheral systems only. Some hardware and software and others developing the software only. These include: a) Voice mail and automated attendant companies who may also sell software applications related to these. 288 - The Telecom Handbook CHAPTER 13 b) Interactive voice response companies (IVR) who manu- facture but also provide the development of IVR solutions (such as being able to check your bank balances by using a touchtone telephone.) c) Fax Server Companies d) Call Accounting, Charge-back and Facilities Manage- ment Companies Manufacturers of call accounting systems tend to be small organizations with under $10 million per year in business. There are one or two that were acquired by larger companies, but still tend to operate as separate entities. This type of company makes and supports the call account- ing software and other related software packages for things such as facilities management or record keeping and telecommunica- tions work order processing. These companies typically prefer to provide the computers and related equipment, such as printers, with which their soft- ware operates. Increasingly their customers are providing the hardware themselves and may be using the systems in a networked environment meaning that multiple people within the same of- fice or connected offices can access the system to make changes or view information. Recognizing the work involved in the administration of on- site Call Accounting Systems, some organizations are opting to use the services of Call Accounting Service Bureaus, discussed later in this tutorial, to accomplish the same objectives. CABLING INSTALLATION COMPANIES Your telephone installation and maintenance company will install the cable for both the telephone system and the com- puter network. Other companies are in the business of running cable only. The company from whom you are buying the telephone system The Telecom Handbook 10 289 UNDERSTANDING THE INDUSTRY is likely to sub-contract the cable pulling