Recommendation ITU-T H.248.50 contains a series of ITU-T H.248 packages that enable various network address translator (NAT) traversal techniques to be employed in order to facilitate media flow between networks. Any of these packages may be utilized in any order to gather and map addresses, as well as maintain connectivity with and through NATs.

Corrigendum 1 (2012) corrects several defects found in the Recommendation and, in particular, it adds descriptions for packages, properties, signal, events and parameters in order to align with the ITU-T H.248 packages template.