TUI operation during an active conference 143Note: When the chairperson dials out to another ICB conference,two ports are seized, the dial-out port of the local ICB and the dial-inport of the remote ICB. This connection can be terminated only if thechairperson drops the dial-out port of the local ICB. However, normallythe dial-out call is a telephone, so the system only seizes one port.Dial-out AuthorizationThe Dial-out Authorization feature enables the chairperson to connectexternal parties to the conference when the desired destination numberis restricted.This feature uses the Meridian Authorization feature. As such, thechairperson must be aware of outdialing restrictions and know theauthorization access code (Flexible Feature Code - FFC or Special Prefix -SPRE on the CS 1000; Auth Access # on the CS 2100/Meridian SL-100).The chairperson must enter the whole string of authorization numbers as theexample in Figure 72 "Dial-out Authorization dialing example" (page 144)shows. There are no confirmation tones or dial tone in the middle of dialing.Nortel Communication Server 1000/Communication Server 2100 Solution/Meridian SL-100Nortel Integrated Conference Bridge: Service Implementation FundamentalsNN43001-558/555-4001-135 01.02 StandardICB Release 4 20 June 2007Copyright © 2007, Nortel Networks.