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Patton Electronics 2701RC
Network Termination Unit (NTU)

Patton 2701RC
G.703/G.704 Network Termination Unit (NTU)
This device terminates G.703/G.704 lines and provides E1/Fractional E1
Model 2701RC photo
  Features & Benefits
  • Terminates E1/Fractional E1 service
  • Available in low-cost standalone or rack-mountable versions
  • n x 64 kbps data rates to 2 Mbps
  • X.21, V.35, EIA-530 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 and remote loopback diagnostics
  • Internal, external and G.703 network timing
  • CE and BABT approvals
  • Rack cards fit into Model 1001 access rack system
  • Conforms to ONP requirements CTR 12 and CTR 13 for connection to international Telecom networks

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 2701 E1/Fractional E1 NTUs satisfies those needs.

The NTUs terminate G.703/G.704 services for all n x 64 kbps rates and connect to the customer’s router, FRAD, CODEC, and switches with a V.35, X.21, EIA-530, or 10Base-T Ethernet interface.

The Model 2701RC/D/D (X.21 version) provides DTE/DCE functionality in a 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/G.704 and provide X.21/V.11 data to a multiplexer.

Model 2701RC Application diagram 1

The Model 2701RC/A/I is a 10Base-T bridge that operates over G.703/G.704 lines. It 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). It uses MAC learning and forwarding to provide seamless LAN-to-LAN connectivity. As a result, corporate enterprises can connect their servers to a pair of Model 2701s and automatically forward data packets that are meant for the remote network. Local packets are filtered and passed only to the local LAN.

Model 2701RC Application diagram 2

Ordering Information
2701RC /B/B Rack card NTU; EIA-530 (DB25F) interface; RJ-48C Network Connector
2701RC /A/I Rack card NTU; V.35 (M/34F) interface; RJ-48C Network Connector
2701RC /D/D Rack card NTU; X.21 (DB15F) interface; Dual BNC Network Connector
2701/D/V Rack card NTU; X.21 (DB15F) interface; RJ-48C Network Connector
2701RC/C/IA Rack card NTU; 10Base-T (RJ-45F) interface; RJ-48C Network Connector


Data Rate: Smooth Clock 2.048 Mbps
Network Connector: RJ-48C (all versions); Dual Coaxial (X.21 and Ethernet)
DTE Interface: EIA-530, X.21/V.11, V.35, or 10Base-T Ethernet
Line Coding: AMI or HDB3
Line Framing: G.703 (unframed) or G.704/G.732 (framed)
Clocking: Internal, External or Receive Recover
DTE Rates: nx64kbps (EIA-530, X.21/V.11, V.35); 10Mbps (10Base-T)
Indicators: E1 Link Status, TD, RD, Loss of Sync, Error, Test Mode, Ethernet Status (on 10Base-T Version)
Diagnostics: Local/Remote Loop, 511
Line Isolation: 1500VRMS
Compliance: CE Mark, G.703, G.704, G.723, G.832, CTR-12 and CTR-13
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)


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