| Agencies that connect to the IEN to share their traffic control data are called IEN Sites. Becoming an IEN Site involves connecting to the IEN network backbone, installing IEN Site Server and Workstation software on systems located at the Agency, and procuring Command/Data Interface software to allow the IEN to communicate with the local Traffic Control System. |
| |
| IEN Connection Diagram |
 |
| |
| Connecting to the IEN Wide Area Network backbone |
| Each Agency will be assigned to a Corridor within the IEN system hierarchy. Agencies will need to install a communication line between their offices and the location of this Corridor Server. This communication line must have a Committed Information Rate (CIR) of 384Kbps or better. |
| |
| IEN Workstation |
| An IEN Workstation is a system on which the IEN User Interfaces are run. Workstations must be joined to the IEN Domain and need network connectivity to the local IEN Site Server and to their Corridor Server. |
- Hardware Specifications
IEN Workstations have the following minimum hardware specifications:
- 3 GHz CPU
- 1 GB of available hard disk space
- 512 MB of RAM
- Network interface
- Network Specifications
IEN Workstations require the following network connectivity:
- 10Mbps or greater connection to the local IEN Site Server
- 384Kbps or greater connection to the Corridor Server
- A connection to the IEN domain controller
- Software Specifications
The following COTS software is used in the IEN Workstation configuration:
- Microsoft Windows XP Professional
- Microsoft Office 2003 Professional
- Oracle 10g Client (with patch set 10.1.0.3.0)
- NTP Client 4.1.7.2
- Microsoft Data Access Components 2.8
- Microsoft .NET Framework 1.1
- Microsoft Visio Professional (or similar graphics editing software)
|
| IEN Workstation installation software and instructions will be provided upon request. |
| |
| IEN Site Server |
An IEN Site Server manages real-time status data and commands at a Site. It collects data from the local Traffic Control System and sends that data to both local IEN Workstations and to its Corridor Server for redistribution to other Sites. A Site Server is also responsible for distributing remote TCS data to local workstations and sending IEN commands to a connected Traffic Control System. |
Each Agency will need to host an IEN Site Server at their location to support local workstations even if no Traffic Control System will be connected to that Site Server. Each Site Server can support a single Traffic Control System connection. |
Site Servers need network connectivity to the Corridor Server, all local IEN Workstations, and the system on which Command/Data Interface software is run (if the Site Server is being connected to a Traffic Control System). |
- Hardware Specifications
IEN Site Servers have the following minimum hardware specifications:
- 3 GHz CPU
- 1 GB of available hard disk space
- 1 GB of RAM
- Network interface(s)
- Network Specifications
IEN Site Servers require the following network connectivity:
- 10Mbps or greater connection to the local TCS Command/Data Interface Server
- 10Mbps or greater connection to local IEN Workstations
- 384Kbps or greater connection to the SGV Corridor Server
- A connection to IEN domain controller
- Software Specifications
The following COTS software is used in the IEN Site Server configuration:
- Microsoft Windows 2003 Standard
- Microsoft Data Access Components 2.8
- Oracle 10g Client (with patch set 10.1.0.3.0)
- Microsoft .NET Framework 1.1
|
| IEN Site Server software and instructions will be provided upon request. |
| |
| Command/Data Interface |
| The Command/Data Interface, or CDI, is the software component that connects an IEN Site Server to a Traffic Control System. Each CDI is designed to interface with a particular type of Traffic Control System. For example, the Series 2000 CDI software in use at the City of Pasadena can be used by any Agency that has TransCore’s Series 2000 Traffic Control System; however, it would not support other types of Traffic Control Systems. Similarly, BI Trans has developed CDI software for their QuicNet/4 system. |
Agencies will need to develop or procure CDI software that supports their Traffic Control System. CDI specifications will be provided upon request. |
| |
| Miscellaneous Networking Components |
| An IEN Site will need various types of commercially available networking equipment, such as routers, switches, and cables, to interconnect the IEN Site components. Agencies are asked to isolate the IEN components from local Agency networks with the use of firewalls and other secure network practices. |
| |
