Polycom DOC2066F manual Between the VTX 1000 and the conference is, General Settings Advanced

Chapter 2 - Defining Standard Audio Only Conferences and Reservations

Table 2-2: Conference Properties - Basic Settings (Continued)

Field/Option	Description
VTX 1000	Select this option if participants are using the VTX 1000
	PSTN endpoint for the same wide band, high quality
	audio used by video participants. The connection
	between the VTX 1000 and the conference is
	established through a modem, and therefore it requires
	the allocation of wide band resources. These resources
	are allocated and maintained throughout the call, even
	if the call disconnects or drops to narrow band mid call.
	Note: VTX 1000 must be enabled at the MCU level in
	the system.cfg file. For a detailed description of the flag,
	see MGC Administrator’s Guide, Chapter 5, “Edit
	“system.cfg””.
General Settings - Advanced
On Hold	Select this option to place the conference on hold.
	While in the On Hold state, all the participants hear the
	background music.
	Clear this check box to reinstate the conference.
	Note: A conference on hold can be released and
	placed on hold during an IVR-enabled On Going
	Conference.
Enable Invite	Select this option to enable the Invite feature. When
	selected, participants in the conference are able to
	invite new participants during the On Going
	Conference. In this mode, the participants are moved
	out of the conference temporarily and can dial-out to the
	invitee.
	Note: This option can be enabled only during the
	conference definition stage of an IVR-enabled
	conference.
SilenceIT	Enables automatic muting of noisy lines during
	IVR-enabled conferences.
Conference Lock	Select this option to lock the conference to undefined
	(Meet Me) dial-in participants and prevent them from
	joining the conference once it has started.
	Note: A locked conference can be unlocked during an
	On Going Conference.

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