... are HWATEL 1U shelf modular flexible Multi-Service Multiplexer/PCM, which provide flexible voice, data port. Within its 30 universal I/O ... solution from center to far end for voice , data, video, IP and other legacy service . PCM30-MST is basic model of PCM30 ... flexible 4 ports E1, 4 port Ethernet, 30 line voice, data port service . PCM8: Compact 1U shelf PCM, E1 uplink , 8 line ...