Site Planning Workflow
Network Infastructure - 10Base-T

• Overview
• EIA/TIA-568 infastructure installation standards
• EIA/TIA-568 media specifcation standards
• Scitex infrastructure cables
• Physical connections
• Network components

Overview

The IEEE 802.3 10Base-T standard network provides 10 Mbit /sec Ethernet networks using twisted-pair cables. The advantages of twisted pair wiring over other types of media are

• low cost
• simplicity in configuring the network
• ease of locating problems in the network.

All cabling infrastructure should be prepared to support future 100 mbit/sec connectivity(ATM, etc).

EIA/TIA-568 infastructure installation standards

The ANSI EIA/TIA-568 document sets out the standards of infrastructure installation

• The maximum horizontal distance shall be 90 meters (295 ft) independent of media type.
• The maximum horizontal cable length has been specified with the assumption that a maximum length of 3 meters (9.8 ft) of cable with the same characteristics as that of the horizontal cable, has been used in the work area.
• A minimum of two telecommunications outlets shall be provided for each individual work area (it is not necessary that they be on separate face plates).
• It is desirable that hardware used to terminate UTP cables be of the insulation displacement contact (IDC) type.The infrastructure cables should not be connected to wall sockets or to patch panels (locating in the communication rack).
• When adaptations are needed in the work area, they shall be external to the telecommunications outlet.
• Some telecommunication equipment (e.g., ISDN terminals) require termination resistors in the work area. This shall be accomplished by placing the termination resistor external to (not integrated into) the telecommunications outlet.
• Passive adapters may be needed when the cable type (media) required by the equipment in the horizontal wiring is different from the cable type (media).
• This requirement specifically prohibits the use of flat, non-twisted cords in the 100-OHM UTP wiring system.
• Between any two devices on the network ,there may be:
  • Up to 5 link segments.
  • Up to 4 repeaters or concentrators.

EIA/TIA-568 media specifcation standards

The EIA/TIA-568 standard also deals with media specifications.

There are 4 types of media specified by the standard.

• 150ohm STP cable.(TYPE1)
• 100ohm UTP cable.(PDS)
• 50ohm Coaxial Cable
• 62.5/125Micron Multimode Fiber.

The EIA/TIA-568 standard appendix lists several other wire types:

• 100ohm STP (S-UTP)
• Other Multimode Fibers Optic.
• Singlemode Fiber Optic Cable.
• 75ohm Coaxial Cable
• Undercarpet Cables.

Scitex infrastructure cables

Scitex supports the following infrastructure cables:

1. The infrastructure cable (the cable running from the communication rack to the work stations) must be comply with category 5 UTP (unshielded twisted pair) 100ohm standard.
2. This cable must have the capacity to transfer data upto 100 Mbit/sec band-width.
3. All 10Base-T network components should comply with category 5, UTP (unshielded twisted pair) or S-UTP cable type standards.
4. In the case where there is a country or customer that requires shielded infrastructure standard cable, the type of infrastructure cable should be standard 10Base-T STP 100ohm cable or Type 1 (IBM) cable type 150ohm STP (shielded twisted pair ) cable. In this case all 10Base-T network components must be of the shielded kind complying with category 5 standards.

Physical connections

There are two possible 10Base-T physical connections:

1. Connect 4 wires from 2*4 (8 wires) to the communication sockets and to the patch panel. This option enables connecting 2 different workstations on the same infrastructure cable.
2. Full connection complying with category 5 standard.
   4 twisted pair cables fully connected on both sides of the category 5 infrastructure cable (communication sockets and patch panel)as follows:
   
   The patch cable should also be full category 5 standard connection.
   Scitex requires installing the network infrastructure to meet the full category 5 standard.

Network components

The 10Base-T network components should be as follows:

1. A 19" communication rack (20U or 44U) equipped with an exhaust fan unit on the top of the rack, one group of 8 electricity sockets and a front door with a lock.
2. All active and passive communication devices (switching hubs, workgroup hubs, 10Base-T patch panels and/or fiber optic patch panels) are placed inside the communication rack.
3. Communication 10Base-T patch panel containing 16 RJ45 female connectors complying with the category 5 standard.
4. Patch cable 4*2*26# ftp (flex twisted pair) category 5 ISO/IEC with RJ45 male connectors on both ends of the cable, complying with the category 5 standard.

Cable lengths:

5. Infrastructure cable 4 twisted pair 24 awg ( twisted number for 1 meter) equivalent to category 5, 100ohm standard.
   There are some category 5 standards which have equivalent substitutes from different working group:

• E IA/TIA category 5
• UL level 5
• NEMA, a low-loss extended frequency premises telecommunication cable.

6. 10Base-T communication sockets equipped with single or double RJ45 female connectors complying with the category 5 standard.
7. 10Base-T transceivers connect to all Ethernet workstations.
   There are 3 kinds of 10Base -T trancievers:

• AUI to RJ45 type, used for connecting all Scitex workstations, Ripro Server LANC MCA boards,all Scitex Sun platform type, Mac connecting with LANC NuBus LANC board. There are some "old" Macs (2ci,fx,2fx,lc) which have a standard Ethernet board connecting to the multibus, in this case also use the AUI to RJ45 type of 10Base-T transceiver.
• AUI to BNC type for connecting all Scitex workstations to a 10Base-2 (chipernet) network.
• AAUI to RJ45 type for connecting Macs equipped with built-in AAUI connectors.

8. Marking:
   The communication rack should be marked as follows.

Communication Rack 1 etc... (in case there are more than one communication racks).

The first 10Base-T patch panel should be marked A, with all the RJ45 female connectors marked systematically from 1 to 16, the next panel should be marked B with all the RJ45 female connectors marked systematically from 1 to 16 and so on.

9. The fiber optic patch panel should be marked from 1-12. Adjacent to each number the color of the fiber must also be listed.

A Fiber Optic Patch Panel

10. The 10Base-T sockets should be marked as in the following example:
11. It is recommended to mark the cable located in the communication rack running from the switching hub to the patch panel«.