Ericsson LBI-39224 - Manual (Page 191)

LBI-39224
3-161
The VOX threshold and 2175 Hz hold tone level settings are
now also stored at the CEC/IMC Manager's hard disk. This is
a change from previous versions, which stored the VOX
threshold and 2175 Hz hold tone level settings only at the
CEC/IMC.
Normally, a channel's VOX threshold level should be set just above
(approximately 3 dBm) the noise floor of the respective line to and
from the conventional base station. With this setting, the VOX will
not trip when the station is squelched and it will immediately trip
from the increase in line noise when the station unsquelches.
Alternately, a channel's VOX threshold may be set much higher
than the noise floor (10 dBm or more) so it will only trip on voice
signals.
Relay Function
In some cases, a Conventional Concentrator Card is utilized to
interconnect lines between conventional base stations and the CI
Boards within the CEC/IMC. In these cases an Audio
Concentrator Card is not used. The following three (3) mutually
exclusive options configure the consoles' ability to control relays
located on the Conventional Concentrator Card when the currently
selected conventional channel is programmed into a
communication module. Select the required option by selecting the
respective option button. To avoid conflicts between different
console commands, it is recommended that all channels on a
common Conventional Concentrator Card be configured
identically. Refer to CEC/IMC Digital Audio Switch Installation,
Set-up and Troubleshooting, LBI-38938, for connection and wiring
details. Relay Function default = "None."
None
Select this option if no relays are present, if the relays are
present but not used (not wired), or if a console must not have
the ability to toggle the relays. Always select "None" if the
currently selected channel connects to the CEC/IMC through
an Audio Concentrator Card (no relays) or a Conventional
Concentrator Card wired in standard configuration (relays not
utilized).
NOTE