With the rapid development of IP network, the broadband data network between companies and cities has gradually come to maturity; how to spend the lower cost to apply the traditional communication service on IP network, which has become the hot spot, such as rapidly popular IP telephone in recent years. Guangzhou Youke Network Equipment Co., Ltd. follows the development trend of information technology, and pushes out YK-TDMoP (TDM over Packet Network) series products on the base of deeply researching traditional service and IP technology. YK-TDMoP is a very good selection for the circuit extension on IP and packet reconstruction of existing telephones.

　The time-division multiplexing equipment YK-TDMoP－1 on packet network can implement the duplex transparent transmission of 1 E1 or transmission of N time slot on the network, and simultaneously provide one network port via the down network port, which supports all traditional E1 and IP service and can access to voice, data, fax, signaling and other telecom services. Such as: if adding telephone access equipment on the two ends, it can access to 30-way telephone, which can fully replace IP telephone on the application, and it is unnecessary to add various gateway equipments of IP under this application mode because it is the complete simulation traditional service, which greatly reduces the cost.

　YK-TDMoP-1 provides one E1 service port, one Ethernet service port and one Ethernet network port. YKMoP can make the operator and enterprise seamlessly and reliably connect TDM equipment and user Ethernet in the structure of standard low-cost wireless or wired Ethernet/IP, and will not generate any influence on the voice quality. YKMoP is transparent to TDM signal, and guarantees any equipment having physical E1 interface to seamlessly connect, such as PBX, mobile base station, SS7 signaling equipment and voice mail system.

　YK-TDMoP-1 supports the accurate transmission and restoration to E1 clock on the packet network and complies with ITU-T G.823 and G.824 clock standards, and simultaneously guarantees the quality of uncompressed long-distance voice. YK-TDMoP also complies with Metro Ethernet Forum/IETF Pseudo-Wire Emulation Edge to Edge (PWE3) (Metro Ethernet Forum/IETF terminal-to-terminal pseudo linear simulation) standards.
Networking Scheme：

Characteristics:

• Conform to the related provisions of G.703 through IP network transparent transmission framing, non-framing E1 and sub-framing E1 (N*64K) signal;
• Conform to Metro Ethernet Forum/IETF Pseudo-Wire Emulation Edge to Edge (PWE3) standards ；
• One E1 circuit and one 10/100Base-Tx down por ；
• Provide L2 or L3 for selecting, when selecting L2, the higher utilization rate of bandwidth can be gained and the more E1 ports can be transmitted on WLAN; when selecting L3, the addressing of transmission packet is based on IP address, and can pass through the exchanger，router and other network equipments;
• Point to point and point to multi-point connection can meet the requirements of different application;
• High transmission efficiency can reach the utilization efficiency of 90 percent bandwidth;
• The smoothness can reach up to 32ms network time-delay
• Output clock source can select: internal clock, external clock, network adaptive clock or the clock that is picked up from E1 receiving line;
• When selecting the network adaptive clock, the original clock can be accurately restored through the restored mechanism of TDM clock; the clock is stable and has small jitter and drift, and therefore conforms to the jitter and drift standards of ITU-T clock;
• The transmission of E1 information on packet switched network has the strict Qos guarantee;
• Common RJ45 Ethernet interface, 10M/100M self-adapting;
• Integrated Ethernet bridge connection;
• Remote and local network management
• Convenient use, plug and play, and without complex settings

 Main Technical Indexes and Functions ：

1.Indexes of power supply
　AC Power supply：
　Voltage range ：160-240V
　Power dissipation：＜6W
　-48V DC Power supply：
　Rated voltage ±20%

2.10/100BASE-TX Indexes of Ethernet interface
　Physical interface type ：RJ-45
　Interface rate ：10/100Mbps
　Working mode : full duplex , half duplex ，10/100M self-adapting
　Conform to IEEE802.3 standards

3.E1 electrical interface index
　Number of sub-circuit ：1
　Physical interface type ：RJ45
　Input Frequency range：2.048Mbps±50ppm
　Interface code pattern ：HDB3
　Interface impedance: 120Ω (balance)
　Conform to ITU-TG703 suggestion

4.Environmental demand
　Working environment：
　environmental temperature：0～50℃
　relative humidity ：20～90%
　Storage environment:
　environmental temperature：-20～65℃
　relative humidity：10～95%