# NetworkInterface.T1E1[x].SignalingType

Determines how voice and signaling information is routed to and from the T1 or E1 trunk and DSP resources.

#### Syntax

NetworkInterface.T1E1[x].SignalingType = 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

CAS

#### Allowed values

CAS | PRI | RAW

#### Example

NetworkInterface.T1E1[0..7].SignalingType = CAS

#### Details

The switch model for the board changes based on the NetworkInterface.T1E1[x].SignalingType setting.

NetworkInterface.T1E1[x].SignalingType can be set to any of the following values:

This value... | Makes settings appropriate for...
--- | ---
CAS | Channel associated signaling. This is the default value.
PRI | Primary-rate ISDN. There are 30 bearer channels for E1 and 23 bearer channels for T1.
RAW | Primary-rate ISDN with no signaling information (that is, no D channel). Connects all channels as voice channels (B channels) and turns off robbed bit signaling. There are 31 bearer channels for E1 and 24 bearer channels for T1.

NetworkInterface.T1E1[x].SignalingType is required for ISDN configurations. If no NetworkInterface.T1E1[x].SignalingType statement is provided in ISDN configurations, an ISDN_BAD_NAI error can be returned, even if the NAI statement is correct.

#### See also

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