NetworkInterface.T1E1[x].Impedance

Specifies the type of cable connecting a CG 6565C board to the 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_120_OHM

Example

NetworkInterface.T1E1[0..7].Impedance = G703_120_OHM

Details

Trunk impedance on the CG 6565C 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 1
2 and 3
4 and 6
6 and 7
8 and 9
10 and 11
12 and 13
14 and 15

Valid settings are:

Setting	Description
DSX1 (T1 only)	For DSX1 cables (up to 655 feet - short haul).
G703_120_OHM (E1 only)	For G.703-standard 120 ohm cables.

To connect a CG 6565C board to a 75-ohm E1 trunk, configure the board as E1 120 ohm and connect a shielded 50-pin Telco cable to a punchdown block or signal entry panel (SEP). Then connect the punchdown block or SEP to a 75 ohm BNC SEP or equivalent to convert the impedance from 120 ohm to 75 ohm.

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