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4 Switch Interface Administration Digital Interfaces
UCS 1000 R4.2 Administration 585-313-507 Issue 3 April 2000 178
Up to 13 PRI T1 circuit cards can have a D-channel. The voice system
supports up to 13 23B+D interfaces (each with its own D-channel and
each set to Yes in this field) or up to 311 B+D (where one card has the D-
channel and the other twelve cards are controlled by that D-channel and
are set to No in this field since they do not have a D-channel). The system
also supports configurations with 2 to 12 D-channels. Typically, each E1
PRI interface has its own D-channel and the system supports up to three
30B+D interfaces.
6 Enter the volume adjustment for all incoming speech on circuit cards in
the
Incoming Speech Volume: field. Valid values are 0 to 32000. Note
that values less than 100 or greater than 8000 may distort the incoming
speech. The default is 1414.
Any adjustment occurs before the system processes the incoming speech
for coding it later for playback. The value in the
Incoming Speech
Volume:
field represents a gain applied to the speech input using a
logarithmic scale. A value of 1000 equals no gain; that is, the input is
coded at the same level as it is received. Multiplying by 1.414 (the square
root of 2) approximately doubles the input volume, or increases it by 3 dB.
Therefore, a value of 1414 in the field doubles the volume of incoming
speech before it is coded, 2000 doubles it a second time, 2828 doubles it
a third time, and so on.