T1 or E1 Carrier Signal over Fiber or IP

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Description Features Drawings Specification Support

H-E1T1-IP   E1/T1 over IP TDM Transport System

Our H-E1T1-IP systems offer you a way to extend the range and functionality of your E1 or T1 connections.  A TDM over IP bridge is a device that transports the E1/T1 signal over an IP based Ethernet network.  This is useful for Telecom providers as a means of providing T1 service over their existing packet-switched infrastructure.  Another popular application is providing T1 links over low cost wireless LAN bridges, eliminating the need for much more expensive microwave radio links.  Wireless links of up to 20 km are possible with this approach.  H-E1T1-IP systems operate transparently providing a seamless connection to all equipment with a physical E1/T1 interface such as a PBX, Cellular base station, SS7 signaling equipment, or voice mail system.  We provide TDM over IP systems for up to 16 T1 or E1 lines.


  •  Up to 16 T1 or E1 links can be multiplexed over IP with a single device
  •  provides transparent links over packet-based IP networks
  •  Provies support for both point to point and point to multipoint applications
  •  Supports SNMP for remote network managment and monitoring
  •  Support for fractional E1/T1 of both framed and unframed interfaces
  •  Minimal cost for installation and support

*All Specifiactions Subject to Change Without Notice
T1/E1 Transmission  
  • Protocols
Triple mode: RTP, Minimal Header Ethernet, AAL1  configurable
  • End to End Delay 
0.7 msec plus network delay jitter
  • Packet Size 
42~1496 bytes, configurable
  • Signaling Relay 
Transparent or guaranteed delivery (configurable)
Clock Distribution  
  • Clocking Options
Loopback; Adaptive
  • Clock recovery algorithm
Proprietary, patent-pending
  • Clock recovery performace
G.823 compliant
  • PDV compensation 
0~800 msec, configurable
Ethernet Traffic Processing  
  • Rate Limiting
0~100 Mbps, configurable
  • VLAN tagging and QoS
802.1p, 802.1q
  • Filtering/Forwarding 
1,000 MAC address bridging table
IP traffic Processing  
  • Internet Protocol Support   
E1 Interface  
  • Connectors   
BNC or RJ48 (optional)
  • Standards
ITU-T Rec. G.703, G.704, G.706, G.732, G.823
  • Framing
Unframed, CRC4 MF, CAS MF
  • Data Rate (per port)
2.048 Mbps
  • Line Code       
  • Jitter/Wander Performance   
ITU-T G.823
  • Receive level
0 to -43 dB; 0 to -15 dB
  • Line Impedance
120 Ohm (balanced)
T1 Interface  
  • Connectors
BNC or RJ48 (optional)
  • Standards
AT&T TR-62411, ITU-T Rec. G.703, G.704, ANSI T1.403, G.824
  • Framing 
Unframed, SF, ESF, D4
  • Data Rate (per port)
1.544 Mbps
  • Line Code
  • Jitter/Wander Performance
AT&T TR-62411
  • Receive level
0 to -36 dB; 0 to -15 dB
  • Line Impedance
100 Ohm (balanced)
Uplink Interface (Ethernet)  
  • Port/Connector
Auto-negotiating 10/100 Mbps / RJ45 8-pin Ethernet
  • Standards
IEEE 802.3, 802.3u
  • Range
Up to 100m on UTP Cat5
Local Management Interface  
  • Port
RS232/V.24(DTE) 115kbps D-type 9-pin(F)
  • User client
CLI Client
Remote SNMP managment  
  • Port
Network or user Ethernet Port
  • User Client
Telnet to CLI; GUI Client
  • Environmental Conditions
Operating temperature 0~50/32~112
Humidity 0~95% non-condensing
  • Power Supply
110~220VAC, -48VDC
  • Enclosure Dimensions
26 cm x 15 cm x 4.5 cm
  • Weight  
2.5 kgs
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