Telecom and Enterprise users can save a lot of access and equipment costs and generates new revenue by offering different types of service over existing Ethernet networks. It is also suitable for connecting to the wireless equipment to achieve fast deployment of E1 services. One particular application is to build E1 links with low cost Wireless LAN bridges, replacing much more costly microwave radios. Operators can use V-EMUX to provide legacy TDM services over wired or wireless packet network. Features 1. Stable E1 clock recovery, low jitter and wander 2. Low processing delay for E1 channels, high bandwidth usage efficiency 3. Resist to packet loss, with PCM frame synchronization protection 4. User definable packet size from 128 bytes up to 1408 bytes 5. Enough jitter buffer to resist packet delay variation (PDV) 6. Local Ethernet port throughput limiting, assuring E1 QoS 7. Local and remote E1 LOS and AIS and packet loss indication for trouble-shooting and maintenance 8. Adaptive E1 port impendence (75ohm and 120ohm) for coax and twisted pair cables 9. User selectable level 2 (Ethernet) or level 3 (IP) encapsulation options 10. Quick setup hardware mode switch 11. Support cascade concatenate for more than 2 E1 ports Technical Specification Items  Description Model  V-EMUX V2  1 uplink, 2E1s, 2 User Data ports V-EMUX V0  1 uplink, 2E1s Interface  Uplink  Comply with IEEE 802.3 E1 Port  2 E1 Ports supported Comply with G.703  Impedance: 75ohm and 120ohm User Data Port(Note: only available on V-EMUX V2)  2 User Data Ports Supported Comply with IEEE 802.3 10/100Mbps auto-sensed Full/Half Duplex auto-sensed Console  RS232, DB9F  9600-8-N-1 Power Supply  AC Type  220V (165~ 265V) DC Type  -48V (-36V~-72V) +24V(+18V~+36V) Consumption  10W Working Environment  Temperature  0oC~ 50oC Relative Humidity  90% (non-condensing