I downloaded the p2 Repository and tried to install the RTC client. The install fails with this message:
An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,com.ibm.etools.annotations.core,1.0.402.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.j2ee,6.0.500.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.j2ee.ui,6.0.700.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.j2ee.web,1.0.400.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.javaee.cdi.core,1.2.100.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.javaee.core,1.2.100.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.javaee.ui.editors,1.0.300.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.maven.javaee.core,1.1.200.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.maven.javaee.ui,1.1.200.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.webservice.was.core,6.1.400.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.webtools.customtag.lib,7.0.700.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.propertygroup,6.5.100.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.etools.annotations.feature,1.0.401.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.aries.juno,1.5.100.v20120717_1538
No repository found containing: org.eclipse.update.feature,com.ibm.etools.aries.v38.feature,1.5.100.v20120717_1538
No repository found containing: org.eclipse.update.feature,com.ibm.etools.javaee.editors.feature.eclipse43,1.1.100.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.etools.maven.javaee.feature,1.1.201.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.etools.rpe.jetty8,1.0.0.v20120918_0346
No repository found containing: org.eclipse.update.feature,com.ibm.etools.rpe.jetty8.feature,1.0.0.v20120918_0346
No repository found containing: osgi.bundle,com.ibm.jee.bean.validation.core,1.0.0.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.jee.bean.validation.feature,1.0.0.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.jee.bean.validation.ui,1.0.0.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.propertygroup.feature,6.6.200.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.wdt.javaee.feature,1.0.301.v20150401_2348
No repository found containing: org.eclipse.update.feature,com.ibm.wdt.webtools.feature,1.0.100.v20150401_2348
No repository found containing: osgi.bundle,com.ibm.websphere.wdt.product.site,1.0.300.v20140602_0512
No repository found containing: org.eclipse.update.feature,com.ibm.websphere.wdt.product.site.fe,1.0.200.v20140602_0512
No repository found containing: org.eclipse.update.feature,com.ibm.ws.ast.batch.webservices,1.0.300.v20150401_2348