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APPENDIX D
D-6
A bridged circuit used for open voice communications
Hoot 'N Holler
between
simultaneous transmission and reception to/from all
termination points on the circuit.
AKA-2W/4W
Hybrid
impedance matching and interconnection of a 2-wire
circuit to a 4-wire circuit. This function is required
whenever a 2-wire telephone set is connected to a 4-
wire voice channel such as the CELP.
Station
The termination point for a voice circuit, usually a
telephone set.
The attenuation of an analog signal as it passes
Transhybrid
through the hybrid from 2-wire in to 4-wire out or from
Loss (THL)
4-wire
approximately 3.5 dB through a passive hybrid. Gain
elements in an active can reduce this loss to 0 dB.
Transmission
The transmission level point. This value is used to
Level Point
convert dBm into dB. The dBm minus the TLP is the
(TLP)
dB. When using a 0 dB tone although the dBm will
vary at various points on a circuit the level of the tone
remains to be 0 dB. The TLP is the level or offset at
which a 0 dB signal would be measured.
An analog wave form. The voice signal as opposed to
VF Signal
the E and M leads.
multiple
locations.
termination
set.
in
to
2-wire
out.
These
circuits
allow
A
device
used
for
Nominal
THL
is
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