Tdm ove rip equipment is mainly used to transmit E1 signals on IP network. It enables operators and enterprises to seamlessly and reliably connect TDM equipment and user Ethernet on a standard low-cost wireless or wired Ethernet / IP structure without any impact on quality. TDM over IP is transparent to TDM signals and ensures seamless connection of any equipment with physical E1 interface, such as PBX, mobile base station, SS7 signaling equipment and voice mail system. It can be used in IP based communication systems, such as LAN, Wan, man and wireless network.
    It has 4 E1 service port, two 10 / 100 / 1000m Ethernet ports, one 100M / Gigabit adaptive SFP optical port and one console management interface;

● arm cortex – M4 processor with main frequency of 192mhz is adopted;
● anodized aluminum alloy shell, IP40 protection grade, can withstand the test of harsh environment;
● provide console (CLI) and web management interface to facilitate installation and opening;
● provide 4 E1 circuit, two 10 / 100 / 1000m Ethernet ports and one 100M / Gigabit adaptive Ethernet SFP optical port;
● E1 interface supports both 75 Ω and 120 Ω interfaces without setting;
● transparent transmission of non framing / framing E1 (n * 64K) signals through IP network, in accordance with relevant provisions of G.703
● clock recovery adopts unique clock algorithm technology, with stable frequency recovery and small jitter and drift. At the same time, the jitter and drift of the recovered clock meet the specifications of g.823/g.824 and g.8261;
● high transmission efficiency and low transmission delay; Ethernet packet length can be set to support long packets; Support VLAN setting;
● support E1 link packet loss indication function;
● support the remote E1 loopback function and local E1 enable setting;
● high transmission efficiency, up to 90% bandwidth utilization efficiency;
● support the online upgrade of local and remote equipment software and hardware by web network management;
● multiple power supply modes are available: AC220V, dc-48v / DC24V, etc;

100/1000M ethernet interface
Protocol: IEEE 802.3az, IEEE 802.1Q (VLAN)
Rate: 10 / 100 / 1000m adaptive, full / half duplex fully adaptive
MAC address table: 4096 MAC addresses can be learned
Physical interface: RJ45 seat supports auto mdix

E1 interface
Equipment interface: the equipment interface shall comply with the recommendation of G.703
Speed: 2048kb / s ± 50ppm
Code type: HDB3
Impedance: unbalanced 75 Ω / balanced 120 Ω (unbalanced coaxial interface adapter can be adapted to 75-2 / 3 coaxial cable)
Jitter characteristics: meet the recommendations of g.742 and g.823
Allowable attenuation of input port: 0 ~ 6dbm;

Environmental indicators
Operating temperature: – 10 ℃ – + 60 ℃
Storage temperature: – 40 ℃ – + 85 ℃
Working humidity: 0% – 95% (no condensation)
MTBF: ＞ 100000 hours