... 1 optical interfaces (FC), single mode, double core, and 4 10/100Mbps Ethernet interfaces, with order wire and console port, and 2 RS232 ... power supply -48V DC and 220V AC. Audio Service port: Maintenance phone port: Maintenance phone has echo tone, busy tone, and ... Base-T Ethernet bridge, support VLAN. Data Service ports: SpecificationsE1 Port l Port number: 4l Bit rate: 2.048Mbps (50ppm)l Impedance ...