# Connecting to an E1 network

This topic provides procedures for:

- Connecting a four-trunk CG 6565 to an E1 120 ohm

- Connecting a four-trunk CG 6565 to an E1 75 ohm

- Connecting an eight-trunk CG 6565 to an E1 120 ohm

- Connecting an eight-trunk CG 6565 to an E1 75 ohm

For more information about the products available for connecting and terminating boards, refer to the Dialogic® Hardware Connectivity Reference Manual.

Before connecting a CG 6565 board to an E1 network, ensure that you have:

- Specified NetworkInterface.T1E1[x].Type = E1 for the keyword value in the board keyword file.

- Specified NetworkInterface.T1E1[x].Impedance = G703_75_OHM, G703_120_OHM, or HIGH_IMPEDANCE for the keyword value in the board keyword file.

- Specified the appropriate keyword values in the board keyword file for the following keywords:

NetworkInterface.T1E1[x].FrameType
NetworkInterface.T1E1[x].LineCode
NetworkInterface.T1E1[x].SignalingType

For more information, refer to Configuring the T1 or E1 interface.

Caution: | Dialogic obtains board-level approvals certificates for supported countries. Some countries require that you obtain system-level approvals before connecting to the public network. To learn what approvals you require, contact the appropriate regulatory authority in the target country.

The CG 6565 board up to eight CEPT E1 interfaces. For typical E1 communications, each E1 interface connects directly to an E1 trunk, as shown in the following illustration:

Trunks synchronize when OAM boots the board.

## Connecting a four-trunk CG 6565 to an E1 120 ohm

Use a shielded RJ-48C cable to connect a four-trunk CG 6565 board configured as 120 ohm to an E1 trunk. If connecting Trunk 2 or Trunk 3, connect a dual T1/E1 120 ohm adapter cable to one or both MD1 RJ-45 interfaces on the board. Connect shielded RJ-48C cables to the trunk connectors on the splitter cables.

## Connecting a four-trunk CG 6565 to an E1 75 ohm

Configure the board as 75 ohm and use an MD1 RJ-45 to BNC adapter cable to connect a four-trunk CG 6565 board.

## Connecting an eight-trunk CG 6565 to an E1 120 ohm

Configure the board as E1 120 ohm and use a shielded 50-pin Telco cable to connect an eight-trunk CG 6565 board. Connect the Telco cable to either a signal entry panel (SEP) or a punchdown block. Failure to use a shielded cable may negate your regulatory approval.

In EU countries, you can connect the board to either an Integrated Services Digital Network (ISDN), Primary Rate Interface (PRI), or a 2048 kbit/s digital structured or unstructured leased line.

## Connecting an eight-trunk CG 6565 to an E1 75 ohm

Configure the board as E1 120 ohm and connect a shielded 50-pin Telco cable to a punchdown block. Then connect each RJ48C interface on the punchdown block to a 75 ohm BNC balun to convert the impedance from 120 ohm to 75 ohm.