Amdocs Ltd  
   Customer care, billing and order management systems for telecommunications carriers and Internet services providers.
   http://www.amdocs.com/

Ascent Telecom  
   Offering customer care and billing software.
   http://www.ascenttelecom.com/

Hansen Corporation  
   Supplier of billing solutions to the world's telecommunications and utility providers.
   http://www.hancorp.com.au/

IBM Telecom Industry Solutions  
   Hardware and software solutions by IBM including an integrated customer care, billing and provisioning system for telcommunications service providers. Product information, FAQ, and case studies.
   http://www.ibm.com/industries/telecom/

Infozech Software Pvt. Ltd.  
   Provider of telecommunications billing and web based customer care solutions.
   http://www.infozech.com/

MaxBill CRM and Billing  
   Customer relationship management (CRM) and billing software supporting electronic bill presentment and payment (EBPP), customer self care and eCRM for service providers such as ISP, ASP, wireless, CLEC, PTT, utilities. Company and product information.
   http://www.maxbill.com/

OpenCon Communication Systems  
   Providing software solutions, including GR-303 and billing mediation, to the telecommunications industry.
   http://www.opencon.com/

Radio Television International  
   Computer software for radio and television traffic, logging and billing.
   http://rti.tvheaven.com/

Ryder Systems Ltd.  
   Software which presents billing information in easily understood formats, ranging from colour printed analysis reports to individual billing data over the Internet.
   http://www.ryder.co.uk

Sandy Beaches Software  
   Providing billing, customer service and management software to telecommunications companies.
   http://www.intelebill.com/

Sigma Systems Group  
   End-to-end customer care & billing. OSS telecom solutions.
   http://www.sigma-systems.com/

TeleCount Telemanagement Systems  
   Call accounting and telemanagement systems with features such as toll fraud, traffic analysis, hospitality, data collection, and billing. Getting started guide, updates, 45 day evaluation.
   http://www.telecount.com

Telution, L.L.C.  
   A provider of integrated customer care, billing and order management solutions for communications providers.
   http://www.telution.com/

Veramark Technologies  
   Provider of enterprise communications management software including network billing and cost control, Internet accounting, and telemanagement. Company and product information, case studies, industry links, and a technical glossary.
   http://www.veramark.com

Vodafone information systems - Billit  
   Billing system for content and communications. Company profile, product information, customers references, news and contact information.
   http://www.billit.de/index_e.php3

Daleen Technologies, Inc.  
   Offers billing and customer management software to providers of telecommunications services. Also offers outsourcing services.
   http://www.daleen.com/

Convergys  
   Integrated billing and customer care services, and employee care services.
   http://www.aistelecom.com/

Open International  
   Customer care, billing and provisioning software for telcommunications and utilities companies.
   http://openinternational.com/