Configuring the T1 or E1 interface

The CG 6100C board has been shipped to you configured as a T1/E1 120 Ohm board. There are no hardware changes required for the T1/E1 120 Ohm configuration. Use the software to set the board configuration by performing the following steps:

Step	Action
1	Set the NetworkInterface.T1E1[x].Type keyword in the board keyword file to T1 or E1. You must specify all trunks that are being used as either T1 or E1. Do not specify more than one trunk type per board. Specify unused trunks as NONE.
2	Set the NetworkInterface.T1E1[x].Impedance keyword to DSX1 (for T1) or G703_120_OHM (for E1).
3	Set the NetworkInterface.T1E1[x].FrameType, NetworkInterface.T1E1[x].LineCode, and NetworkInterface.T1E1[x].SignalingType keywords to values appropriate for your configuration. For more information about the board keyword files and specific keyword values, refer to the keyword reference section of this manual.
4	Ensure that you use the correct cables as specified in Connecting to an E1 network or Connecting to a T1 network.

E1 75 Ohm configuration

Use a balun (NMS P/N 33051) to connect the CG 6100C as an E1 75 Ohm board. A 20-port balun is also available (NMS P/N 33050 or L-COM P/N ACD 2201). A balun is a transformer that converts the impedance from 120 Ohm to 75 Ohm. Configure the board as an E1 120 Ohm board.

Sample T1 trunk configuration

The following example shows a sample T1 configuration for 16 trunks:

NetworkInterface.T1E1[0..15].Type         = T1
NetworkInterface.T1E1[0..15].Impedance    = DSX1
NetworkInterface.T1E1[0..15].LineCode     = B8ZS          [other values possible]
NetworkInterface.T1E1[0..15].FrameType    = ESF           [other values possible]
NetworkInterface.T1E1[0..15].SignalingType = CAS         [other values possible]
DSP.C5x[0..19].XLaw                       = MU_LAW
DSPStream.VoiceIdleCode[0..19]            = 0x7F
DSPStream.SignalIdleCode[0..19]           = 0x00

Sample E1 trunk configuration

The following example shows a sample E1 configuration for 16 trunks:

NetworkInterface.T1E1[0..15].Type         = E1
NetworkInterface.T1E1[0..15].Impedance    = G703_120_OHM
NetworkInterface.T1E1[0..15].LineCode     = HDB3          [other values possible]
NetworkInterface.T1E1[0..15].FrameType    = CEPT
NetworkInterface.T1E1[0..15].SignalingType = CAS         [other values possible]
DSP.C5x[0..19].XLaw                       = A_LAW
DSPStream.VoiceIdleCode[0..19]           = 0xD5
DSPStream.SignalIdleCode[0..19]           = 0x09