src/net/java/sip/communicator/service/protocol/SingleCallInProgressPolicy.java
/**
         * Starts/stops tracking the new <tt>Call</tt>s originating from a
         * specific <tt>ProtocolProviderService</tt> when it
         * registers/unregisters in order to take them into account when putting
         * existing calls on hold upon a new call entering its in-progress
         * state.
         *
         * @param ev the <tt>ServiceEvent</tt> event describing a change in the
         * state of a service registration which may be a
         * <tt>ProtocolProviderService</tt> supporting
         * <tt>OperationSetBasicTelephony</tt> and thus being able to create new
         * <tt>Call</tt>s
         */
Starts/stops tracking the new Calls originating from a
specific ProtocolProviderService when it
registers/unregisters in order to take them into account when putting
existing calls on hold upon a new call entering its in-progress
state.

@param ev the ServiceEvent event describing a change in the
state of a service registration which may be a
ProtocolProviderService supporting
OperationSetBasicTelephony and thus being able to create new
Calls
Starts / stops tracking the new Calls originating from a specific ProtocolProviderService when it registers / unregisters in order to take them into account when putting existing calls on hold upon a new call entering its in - progress state . @param ev the ServiceEvent event describing a change in the state of a service registration which may be a ProtocolProviderService supporting OperationSetBasicTelephony and thus being able to create new Calls
public void serviceChanged(ServiceEvent ev)
        {
            if(logger.isTraceEnabled())
            {
                logger.trace("Service changed.");
            }
            SingleCallInProgressPolicy.this.serviceChanged(ev);
        }
public void serviceChanged ( ServiceEvent ev ) { if ( logger . isTraceEnabled ( ) ) { logger . trace ( "Service changed." ) ; } SingleCallInProgressPolicy . this . serviceChanged ( ev ) ; }
Starts/stops tracking the new <tt>Call</tt>s originating from a
 specific <tt>ProtocolProviderService</tt> when it
 registers/unregisters in order to take them into account when putting
 existing calls on hold upon a new call entering its in-progress
 state.
Starts / stops tracking the new <tt > Call< / tt > s originating from a specific <tt > ProtocolProviderService< / tt > when it registers / unregisters in order to take them into account when putting existing calls on hold upon a new call entering its in - progress state .