extension bit
Telecommunications
The first bit of each octet of the address field of a packet. The first octet is identified by the extension bit set to 0, and the second octet is identified by the extension bit set to 1. [T1.312-1991]
The first bit of each octet of the address field of a packet. The first octet is identified by the extension bit set to 0, and the second octet is identified by the extension bit set to 1. [T1.312-1991]