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VX Call Flow

The VX call flow process is shown below

VX Call Flow

The First Call from the Public Switched Telephone Network

The first call from the PSTN is processed as shown below.

The First Call from the Public Switched Telephone Network

The PSTN Call as Seen by VXbuilder

To VXbuilder, the call looks like the flow shown below.

The PSTN Call as Seen by VXbuilder

The First Call from a Public Branch Exchange

The first call from a PBX flows as shown below.

The First Call from a Public Branch Exchange

Configuring a Trunk Group to Support a PBX

A PBX connection will likely employ a different ISDN protocol than typically configured. QSIG is a common PBX interconnect ISDN protocol. To edit your configuration to accommodate this change, select the appropriate port in VXbuilder as shown below.

Changing Your Trunk Group Configuration

Click Edit and make the necessary configuration changes (highlighted) as shown below

Changing Your Trunk Group Configuration

Editing the PBX Port Configuration

Click Transmit to have your changes take effect.

Editing the PBX Port Configuration

PBX Call Flow as Seen by VXbuilder

From VXbuilder, the call flow looks as shown below.

PBX Call Flow as Seen by VXbuilder

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