Of an electromagnetic wave having elliptical polarization, the ratio of the magnitudes of the major axis and the minor axis of the ellipse described by the electric field vector.

A light ray that travels along the optical axis.

Abbreviation for bit.

Abbreviation for bel, byte.

1. A communications channel used for the transmission of an aggregate signal generated by multichannel transmitting equipment.
2. The CCITT (now, ITU-T) designation for a clear channel, 64-kb/s service capability provided to a subscriber under the Integrated Services Digital Network offering.
Note: The B channel, also called the bearer channel, is intended for transport of user information, as opposed to… (Read More →)

An MPEG video frame type that provides bidirectional interframe compression.
Note: A b frame derives its content from the closest 1 or P frame, one in the past and one in the future. Generating b frames requires greater computing power than does generating 1 or P frames. The use of b frames enables compression ratios of 200:
1. Robust MPEG… (Read More →)

Billing and Customer Care

Abbreviation for broadband ISDN.

Abbreviation for bits per second.

Business to Business