ITU-T G.992.3 Annex L is an optional specification in the ITU-T ADSL2 recommendation G.992.3 titled Specific requirements for a Reach Extended ADSL2 (READSL2) system operating in the frequency band above POTS, therefore it is often referred to as Reach Extended ADSL2 or READSL2. Although the standard development is completed and verified by the ITU, some scrupulous owners of local loop networks don't allow this standard to be used because the high power can create audible cross-talk. In contrast, this standard is implemented nationwide by the incumbent local exchange carrier France Telecom.