SL-2000 is a powerful optical multiplexer which can aggregate three types of service into a pair of fiber. Any combination of four kinds (4*E1, 4*V.35, 1*V.35, 1*10/100M Ethernet) of tributary card is allowed to plug-in the system and its maximum capacity is 16 channel E1. It supports the 1+1 hot-swappable optical protection. The SL-2000 can be managed through SNMP, VT100 craft port or LCD/menu keys. It also supports orderwire function for maintenance purpose. It is 1U, 19” rack mountable or desktop type model.