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November 2009 428
Stream A logical data entity that corresponds to a physical data line on a
TDM bus.
T1/E1 span The set of slots that comprises one T1 (24) or one E1 (30) line. The
spans are numbered starting at 1.
TCP Transmission Control Protocol
Time slot A logical entity that corresponds to one telephone call.
Unit number 1. In telephony configuration files and functions, a unit is a
hardware port on a Brooktrout board and is numbered starting at 0
(to denote a TDM bus); from 1 to n (for a specific T1/E1 interface).
2. In some Bfv functions (e.g., BfvLineAttach), an ordinal channel
number. Its range is 0...n-1, where n is the number of channels in a
system.
VAD Voice Activity Detection
Work channel One of the channels on a module that is available for
non-administrative purposes as a result of downloading firmware. A
module configured for 48 channels when firmware download is
performed has 48 work channels and one administrative channel.
Logical work channel numbers start at 2 on each module.