# NetworkInterface.T1E1[x].Impedance

Specifies the type of cable connecting a CG 6060 board to the T1 or E1 network.

#### Syntax

NetworkInterface.T1E1[x].Impedance = cable_type

x = 0-(n-1) (0-based trunk number or range of trunk numbers where n equals the number of trunks on the board.)

#### Access

Read/Write

#### Type

String

#### Default

G703_120_OHM

#### Allowed values

DSX1 | G703_75_OHM | G703_120_OHM | HIGH_IMPEDANCE

#### Example

NetworkInterface.T1E1[0..3].Impedance = G703_120_OHM

#### Details

Trunk impedance on the CG 6060 is controlled through a board configuration file. Since trunks are configured in pairs, the configuration setting must be identical for both trunks in a given pair. Trunks are paired as follows:

- 0 and 2

- 1 and 3

Valid settings are:

Setting | Description
--- | ---
DSX1 (T1 only) | For DSX1 cables (up to 655 feet - short haul).
G703_75_OHM (E1 only) | For G.703-standard 75 ohm cables.
G703_120_OHM (E1 only) | For G.703-standard 120 ohm cables.
HIGH_IMPEDANCE (T1 or E1) | Reserved for T1 or E1 trunk monitoring applications.

Refer to Configuring the T1 or E1 interface for more information.

#### See also

NetworkInterface.T1E1[x].CRCMFMode, NetworkInterface.T1E1[x].D_Channel, NetworkInterface.T1E1[x].FrameType, NetworkInterface.T1E1[x].Length, NetworkInterface.T1E1[x].LineCode, NetworkInterface.T1E1[x].SignalingType, NetworkInterface.T1E1[x].Type