Справочник Пользователя для Polycom 7.5

An Entry Queue is a special routing lobby to which one or several dial-in 
numbers are assigned. When callers dial this number, they access this Entry 
Queue where they wait to be routed and connected to the conference. The 
following Entry Queue options are available:

Both video and audio participants (including IP phones) connect to the Entry 
Queue and, using voice prompts, are routed to their conference according to 
the conference numeric ID or password (depending on the MCU 
configuration) they submit. This process is automatic, unless the participant 
requires help. Depending on the Entry Queue service configuration, operator 
assistance may be available to all participants during the connection process.

Dial-in participants are personally greeted by an operator (in an Operator 
conference) who accompanies them to their conference. 

An On Going Conference is initiated from an Entry Queue that is configured 
to support Ad Hoc (reservation-less) conferencing. The conference is created 
according to the Profile assigned to the Ad Hoc-enabled Entry Queue.

For a detailed description of this feature, refer to the MGC Manager User’s 
Guide Volume II, Chapter 3, “Ad-Hoc Conferencing and External Database 
Authentication”.