The TDMoverIP device is mainly used to provide 4 service card slots on the IP network. It can be inserted into the E1 module (4 E1 interfaces), voice module (4/8/16 FOX/FXS interface), V.35 module (2 channels). V.35 interface), serial interface module (4-ch RS232/422/485 interface); maximum capacity can be filled in 4 slots. Enables operators and enterprises to seamlessly and reliably connect TDM devices and user Ethernet on a standard low-cost wireless or wired Ethernet/IP fabric with no impact on voice quality. TDM over IP is transparent to TDM signals, ensuring that any device with a physical E1 interface is seamlessly connected, such as PBX, mobile base stations, SS7 signaling devices and voice mail systems. Can be used in IP-based communication systems such as LAN, WAN, MAN, and wireless networks.
    It is with 4 slot service card, two 100/1000M Ethernet ports, one 100/1000M Ethernet optical port, and one
console management interface.

● Provides 4 slot service card, 2*100/1000M Ethernet ports, and 1*100/1000M Ethernet SFP port ；
● E1 port can be 75Ω or 120Ω ；
● Transparent transmission of unframed/framing E1 (N*64K) signals over IP networks, in compliance with G.703
regulations ；
● The clock recovery adopts the unique clock algorithm technology, the frequency reproduction is stable, the jitter
and drift are small, and the jitter and drift of the recovered clock are in accordance with G.823/G.824 and
G.8261 ；
● High transmission efficiency, low transmission delay; Ethernet packet length can be set, support long packet;
support VLAN setting ；
● Support package loss indicator function for E1 transmission line；
● Local and remote E1 loop and local E1 enable function；
● High efficiency transmission, up to 90% bandwidth utility ratio；
● Support WEB network management for online upgrade of local and remote device software and hardware ；
● Provide 4 slots plug-in modules：
 4×unFramed E1 module（75Ω）/（120Ω）
 4×Framed E1 module（75Ω）/（120Ω）,any timesolts can be set
 4×FXO/FXS/EM2-4/Magnet telephone module
 8×FXO/FXS/2 line audio/Magnet telephone module
 16×FXO/FXS/2 line audio/Magnet telephone module
 2×V.35/V.24 (2.048M Fixed speed) module
 2×V.35 (N*64K N=1-32) module
 4×RS232/422/485 module

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;

V.35 interface
Interface rate: 2048Kbps
Interface Standard: Compatible with V.35 Standard
Connector: DB25
Connect Mode: DCE
Clock Type: G.703 restored clock, Internal clock
FXS Phone Interface
Ring voltage: 75V
Ring frequency: 25HZ
Two-line Impedance: 600 Ohm (pick up)
Return loss: 40 dB
FXO Switch Interface
Ring detect voltage: 35V
Ring detection frequency: 17HZ-60HZ
Two-line Impedance: 600 Ohm (pick up)
Return loss: 40 dB
Environmental indicators
Operating temperature: – 10 ℃ – + 60 ℃
Storage temperature: – 40 ℃ – + 85 ℃
Working humidity: 0% – 95% (no condensation)
MTBF: ＞ 100000 hours