DC1200: Unframed E1 to V.35 Converter

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The DC1200 provides a new level of price and performance when connecting routers to unstructured E1 G.703 2Mbps leased lines.

The DC1200 provides the conversion necessary to connect the V.35 serial interface of a router to a 2Mbps leased line.

Front: WC1000WC1000 AC rear

E1 G.703 - V.35 Interface Converter

DC1200 as an E1 G.703 to 2.048Mbps V.35 converter
DC1200 as an E1 G.703 to 2.048Mbps V.35 converter
  • Cost Effective E1 to V.35 interface conversion
  • V.35 DCE port for router connection
  • E1 2Mbps G.703 port for leased line connection
  • Easy to install & maintain
  • Integral auto-sensing power supply (100-250V AC or -40V DC versions)
  • 12-24V DC power supply available on request
  • External alarm relay port
  • Compact modem style unit, built to European standards
  • Rack mounting kits for 2 or 18 units available
  • Quad option available with 4 DC1200 units in a 1U box
  • Can also be used in reverse connecting an E1 device such as a PBX to a V.35 service
  • Can also be used to connect E1 devices to V.35 satellite modems

Router Applications

PBX Applications

Satellite Applications

DC1200 connecting a V.35 router to an unframed E1 G.703 leased line

DC1200 connecting a V.35 router to an unframed E1 G.703 leased line

This application shows a DC1200 connecting a V.35 router card to an unframed E1 G.703 2.048Mbps leased line, such as a BT Megastream-2 service. V.35 serial ports are often the most cost effective WAN port available on routers. Most Telecom carriers provision E1 2.048Mbps services with G.703 connectivity. Care must be taken to ensure that the remote equipment is configured in a compatible manner (i.e. V.35 or unframed E1 G.703).

V.35 routers connected together via an unframed E1 G.703 leased line using DC1200 units

V.35 routers connected together via an unframed E1 G.703 leased line using DC1200 units

This application shows a pair of DC1200 units connecting a pair of V.35 routers via an unframed E1 G.703 2.048Mbps leased line, such as BT's Megastream-2 service. V.35 serial ports are often the most cost effective WAN port available on routers. Most Telecom carriers provision E1 2.048Mbps services with G.703 connectivity. Care must be taken to ensure that the remote equipment is configured in a compatible manner (i.e. unframed).

DC1200 connecting an E1 G.703 router to a V.35 2.048Mbps leased line

DC1200 connecting an E1 G.703 router to a V.35 2.048Mbps leased line

This application shows a DC1200 connecting an E1 G.703 router card to a V.35 2.048Mbps leased line, such as a BT Megastream-2 service. Care must be taken to ensure that the remote equipment is configured in a compatible manner (i.e. either V.35 or unframed E1 G.703). This application requires a V.35 DCE to V.35 DCE crossover cable.

E1 routers connected together over an V.35 2.048Mbps leased line using DC1200 units

E1 routers connected together over an V.35 2.048Mbps leased line using DC1200 units

This application shows a pair of DC1200 units connecting a pair of E1 G.703 routers via a V.35 2.048Mbps leased line, such as BT's Megastream-2 service. This application requires the use of V.35 DCE to V.35 DCE crossover cables.

DC1200 connecting a PBX to a 2.048Mbps V.35 leased line

DC1200 connecting a PBX to a 2.048Mbps V.35 leased line

This applications show a DC1200 being used to connect a PBX PRI port to a 2.048Mbps V.35 leased line, for when either an existing V.35 leased line is available for re-use or alternatively when V.35 connectivity has been provided rather than G.703 (e.g. for economic reasons). This application requires a V.35 DCE to V.35 DCE crossover cable.

PBXs connected together via a 2.048Mbps V.35 leased line using DC1200 units

PBXs connected together via a 2.048Mbps V.35 leased line using DC1200 units

This applications shows how a pair of PBX systems can be connected together via a 2.048Mbps leased line using a pair of DC1200 units. This would occur either when an existing V.35 leased line is available for re-use, or alternatively when V.35 connectivity has been provided rather than G.703 (e.g. for economic reasons). This application requires the use of V.35 DCE to V.35 DCE crossover cables.

Connecting E1 routers to V.35 satellite modems

Connecting E1 routers to V.35 satellite modems

This application shows a DC1200 connecting an E1 G.703 router card to a V.35 satellite modem. The DC1200 supports a number of different clocking modes, and so it is possible to source the clocking for this network from the satellite modems, from one of the terrestrial circuits or from a DC1200 or router. This application requires a satellite link operating at 2.048Mbps and a V.35 DCE to V.35 DCE crossover cable.

The DC1200 offers conversion between a V.35 serial interface and an E1 line interface with BNC or RJ45 connector options.

The DC1200 has a simple multi-function status LED and BIT switch configuration with comprehensive configuration and diagnostic information on the unit base label making the DC1200 a truly plug and play device.

The DC1200 can easily be rackmounted in either a 1U two unit rackmount kit, in a 6U eighteen unit rackmount kit or is available in a quad box (1U rackmountable unit containing 4 x DC1200 units).

The DC1200 is also available in a card based format for use with the 4U 12-slot MetroRack managed chassis.

Please Note:

The DC1200 unit is for an unframed (clear channel) 2Mbps E1 G.703 circuit. If you have a framed (fractional) E1 G.704 circuit, i.e. Nx64kbps, or require framing, a DC3200 (unmanaged) or FM4000 (managed) is required. Many carrier services provide a framed or fractional E1 link, please double check with your provider to ensure that you are using a clear channel 2Mbps E1 G.703 leased line service with this product.

Line E1 Interface
Port G.703, 75 ohm unbalanced, 120 ohm balanced
Interface BNC (75ohm), RJ45 (120ohm)
Line Coding HDB3
Bit Rate 2.048Mbps +/- 50ppm
Barrier Fully compliant as per EN41003
Cable Lengths RG59 = 600m, UR202 = 750m

DTE Interface
Port V.35
Interface ISO2593 34-way female M-rack
Bit Rate 2.048Mbps

Configuration
Clocks Internal, E1 Loop, Terminal, DTE mode
Set by dip switches

Compliance & Approvals
Performance PD7024 (NTR4)
Safety EN41003, EN60950
EMC EN55022, EN50082

Integral Power Supply
AC Mains 100 - 250 VAC, 50 - 400Hz, 30 - 12 mA, IEC Connector
-48VDC Supply -40 to -72 VDC, 115 - 45 mA
Power Consumption 3.5 watts approx when operating

Environment
Temp 0 - 50 deg C
Humidity 95% RH, non-condensing
Pressure 86 - 106 kPa

Packaging
Type Modem, 1U high without feet, IP30C

Dimensions (W x D x H mm)
strong Rackmount 202 x 132 x 44 (without feet)
Desktop 202 x 132 x 48 (with feet)
Order Code
Product
AC Mains: 100 - 250 VAC DC Power: -48 VDC
DC1200 80-05-212 80-21-212
2 Unit Rackmount Kit 80-05-256 80-05-256
18 Unit Rackmount Kit 80-05-250 80-05-255
Quad DC1200 80-405-212 80-421-212
MetroRack DC1X00 Module 80-15-210 80-15-210

Product variants with 12V to 24V DC operation are also available on request.

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