TL 9000: A Two-part Quality Management System 

The TL 9000 standard is the telecom industry's unique extension to ISO 9001:2008 and includes supplemental requirements in the following areas:

Performance measurements based on reliability of product

Software development and life-cycle management

Requirements for specialized service functions such as installation and engineering

Requirements to address communications between telecom network operators and suppliers

Reporting of quality measurement data to a central repository

As a result, the TL 9000 is a two-part quality system with significant management andmeasurement components. In particular, TL 9000 certified organizations are required to comply with:

All requirements clauses of the International Standards ISO 9001:2008

Telecom-specific requirements that apply to all registrations

Telecom-specific requirements that apply to hardware, software and/or service registrations

Telecom industry measurements that apply in all product categories

Telecom industry measurements that apply in certain product categories specific to hardware, software and/or services