... which provide flexible voice, data port. Within its 30 universal I/O slots, it supports the plug-in ... flexible voice, data port. Application Feature Within its 30 universal I/O slots for the plug-in over ... Access Multiplexer with optical uplink, support up to 30 pcs universal -slot for I/O card PCM30F ... which provide flexible 4 ports E1, 4 port Ethernet, 30 line voice, data port service . PCM8: Compact 1U ...