p × 64

In video teleconferencing, pertaining to a family of CCITT (now, ITU-T) Recommendations, where p is a non-zero positive integer indicating the number of 64 kb/s channels. Note: The p × 64 family includes Recommendations H.261, H.221, H.242, H.230, and H.320. These Recommendations form the basis for video telecommunications interoperability.