... modular to connect to PABX ETH Ethernet data modular V35 V.35 synchronization data modular X21 X.21 ... 35 port selectable, 8 lines FXS/O, 1 port RS232 PCM8F-4EE: Compact 1U shelf Multiservice multiplexer, 155M ... port 100M Ethernet, 8 lines FXS/O, 4 port RS232 PCM4: E1 uplink , 4 line FXS/FXO PCM4F: ... -2E4RS: E1 uplink, 4 line FXS/O + 4Ports Rs232/485 + 2 ports Physical separate Ethernet DM3300: 6U shelf ...