User Guide| LQ Series 4.0
8 Interface port configuration
8.1
Call signaling and Remote Mic Kill (RMK)
Call signaling is automatic on all audio routes so a call signal can be routed to any
destination (2-wire or 4-wire).
Call signaling will be passed to some third party intercom equipment, but it may not
be recognized.
RMK is supported and passed through to 2-wire participants only.
8.2
2-wire specific port options
Default option is shown in bold.
8.2.1
Device interface settings
Power: Disabled/Enabled. Enable power if you want to power partyline beltpacks
from the line. See Power 2-wire beltpacks from the Partyline on page 21 for
more information.
Note: Enabling power will enable termination by default.
Mode: Clear-Com/RTS. For pinouts for each of these see Pinouts on page 173.
8.2.2
2-wire specific port settings
l Input/Output gain: -3 to +3 dB. Default = 0.
l Termination: Disabled/Enabled. Termination is used to eliminate echo and
distortion when 2 or more 2-wire devices are connected. This setting is
automatically enabled when power is enabled on the line. It can be toggled on
and off as power should only be terminated once within any series of
connected devices.
l Autonull. Autonull should be started whenever 2-wire devices are connected
or re-wired. Do not listen in on the headset while autonull is being performed.
8.3
4-wire specific port options
Note: To minimize noise, use screened (shielded) cable when connecting 4-wire ports.
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