Model 2707
Lowest Cost G.703 Network Termination Unit (NTU)
This device terminates G.703 lines and provides serial and 10Base-T interface conversion
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  • Terminates E1 services
  • Available in low-cost standalone or rack-mountable (2707RC) versions
  • 2 Mbps data and line rate
  • X.21, V.35, and Ethernet bridge options
  • Switch-selectable AMI or HDB3 line encoding options
  • Switch-selectable DTE/DCE modes for X.21 version
  • 75-ohm dual coax and 120-ohm twisted-pair G.703 connections
  • Local loopback diagnostics
  • Internal, external and G.703 network timing
  • CE approved
  • 120/230 VAC & 48 VDC power options
  • Conforms to ONP requirements CTR 12 for connection to international telecom networks
  • 1.6 km distance

Today's customers require low-cost network solutions that deliver high speed connections to the Internet and Corporate Intranets while supporting videoconferencing and many other wide-area services. The NetLink Model 2707 E1 NTUs satisfies those needs.

The NTUs terminate G.703 and connect to the customer's router, FRAD, CODEC, and switches with a V.35, X.21, or 10Base-T Ethernet interface.

The Model 2707/D (X.21 version) provides DTE/DCE functionality in the same standalone or rack-mount package. This added versatility supports operation in X.21 DTE applications (see diagram below) where an NTU is needed to terminate G.703 and provide X.21/V.11 data to a multiplexer.




Our Ethernet version, the Model 2707/I offers 10Base-T bridging and supports PPP and 802.1q VLAN tagging, passing vLAN-tagged packets of up to 1522 bytes. These features enable customers to extend a router's serial interface and connect to a remote 10Base-T Ethernet LAN (see diagram below). The 2707/I uses MAC learning and forwarding to provide seamless LAN-to-LAN connectivity.





Data Rate: Smooth Clock 2.048 Mbps
Network Connector: RJ-48C (all versions); Dual Coaxial (X.21 and Ethernet)
DTE Interface: X.21/V.11, V.35, or 10Base-T Ethernet
Line Coding: AMI or HDB3
Line Framing: G.703 (unframed)
Clocking: Internal, External or Receive Recover
Indicators: E1 Link Status, TD, RD, Loss of Sync, Error, Test Mode, Ethernet Status (on 10Base-T Version)
Diagnostics: Local Loop
Line Isolation: 1500VRMS
Compliance: CE Mark, G.703, and CTR-12
Temperature: 32° to 122°F (0° to 50°C)
Rel. Humidity: 5 to 90% non-condensing
Dimensions: 5.84L x 4.16W x 1.51H in (14.84L x 10.6W x 3.84H cm)
Weight: 2.225 lbs (1.02 Kg)


2707/C G.703 ACCESS CONVERTER, W/ V.35 INTR, NO PS
2707/C/48 G.703 ACCESS CONVERTER, W/ V.35 INTER.
2707/C/UI G.703 ACCESS CONVERTER, W/ V.35 INTR
2707/D/48 G.703 ACCESS CONVERTER, W/ X.21 INTR
2707/D/UI G.703 ACCESS CONVERTER, W/ X.21 INTR
2707/I/48 G.703 10BASE-T ACCESS CONVERTER
2707/I/UI G.703 10BASE-T ACCESS CONVERTER
2707RC/A/I G.703 ACCESS CONVERTER RACK CARD, V.35
2707RC/C/IA G.703-10BASE-T ACCESS CONVERTER RACK CARD
2707RC/D/D G.703 ACCESS CONVERTER RACK CARD, X.21
2707RC/D/V G.703 ACCESS CONVERTER RACK CARD, X.21

E1 G.703/G.704 Access (NTU)
Model 2070 Co-Directional G.703 Converters
Model 2073 G.703/64-kbps Interface Converter
Model 2073RC 64 kbps/G.703 Access Converter
Model 2701 G.703/G.704 Network Termination Unit (NTU)
Model 2701RC G.703/G.704 Network Termination Unit (NTU)
Model 2702 Micro-Pak™, 2-Mbps G.703 Access Converter
Model 2703 MegaLink-I™ 2-Mbps G.703 Access Converter
Model 2715 E1/FE1 Network Termination Unit (NTU)
Model 2715RC G.703/G.704 Network Termination Unit (NTU)


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