GAI-Tronics L3149B C200 Advanced Deskset - Manual (Page 52)

Programming L3149B (C200) Advanced Tone Remote Desk Set
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Type of Interface
Select the type of interface depending upon the modules installed in the desk set:
 Tone Control is available regardless of what hardware is installed.
 If the relay I/O control module is installed, select E&M with Tone, E&M without Tone, or Local
Control .
Type of Wire
Select between 2-wire and 4-wire interface. Select 2-wire if receive and transmit audio will be
available on the same pair of wires. Select 4-wire if the receive audio and transmit audio each have a
separate pair of wires.
Full Duplex
If this parameter is Enabled, full-duplex communication is available only while using the handset.
When the handset is on-hook, only half duplex operation is available. If it is Disabled, communication
is half-duplex regardless of the hook switch. If the interface is not Tone control or Tone with E&M,
this parameter is not selectable.
N OTE : When configured for full-duplex two-wire operation, the transmit audio can be heard in the
handset ear piece. If the mic delay is set to a non-zero value, it may cause confusion during transmit due
to the audible delayed voice audio. To avoid this, set the mic delay to 0 ms.
4-Wire Intercom Path
If using a four-wire line, separate transmit and receive pairs, this should be enabled in order to hear other
parallel desk sets when they are transmitting or during intercom. Disabling this path may be necessary if
two or more desk sets are located near each other.
N OTE : This parameter can only be selected if Type of Wire is 4-wire.
Line Termination
For a system consisting of multiple parallel desk sets, the line termination should be enabled for only one
unit. This unit should be the one located farthest away from the tone adapter. Enabling this parameter
terminates the receive audio with 560 ohms.
Use E-lead for VOX selection
The selection of this parameter is only available if the type of interface is set for E&M or E&M with
Tone
. An input in the Relay Input/Output Table must be programmed for Input VOX or E-lead. This
input is used only to indicate a VOX status and is not used to squelch or unsquelch the speaker. The
speaker squelch is controlled by the presence of receive audio activity only.