TECHNICAL BULLETIN
8/8/91

                SUPPORTED CABLES FOR USE ON LANTASTIC NETWORKS:

ARTISOFT 2 MEGABIT ADAPTERS:
      1. Artisoft Dual Twisted Pair -- 1500 feet (457 meters) total
            cable length per segment
      2. Belden DTP 9729 or 89729 -- 1000 feet (304 meters) total
            cable length
      3. Phone grade DTP, 24 gauge, 100 ohm -- 300 feet (91 meters)
            total cable length
      4. Standard db9 connector using pins 3, 4, 7, 8.

LANZ:
      1. The cable included in the network kit.
      2. A standard null modem cable may work with SPORT up to 50
            feet (15 meters)

ARTISOFT NE3/AE2/AE3 ADAPTERS:
IEEE 802.3 Thinnet (10Base2 Ethernet), 607 feet (185 meters) per
segment (30 nodes):
      1. Artisoft Coax RG58au
      2. Belden 9907 or 89907 Coax RG58au
      3. Any IEEE 802.3 compliant RG58au or RG58cu
      4. BNC connectors

IEEE 802.3 Thicknet (10Base5 Ethernet), 1640 feet (500 meters)  per
segment (100 nodes):
      1. Belden 9880
      2. db15 AUX connectors

IEEE 802.3 Twisted Pair (10BaseT Ethernet), 328 feet (100 meters)
per segment (1 node):
      1. Artisoft UTP
      2. AT&T 104, 315, 205
      3. Belden 1227A
      4. RJ45 connectors


IEEE 802.3 10BASE2 COAX CABLE CHARACTERISTICS:

1. Characteristic Impedance:
      50 ohms +/- 2 ohms.

2. Attenuation
      A 185m cable segment shall not exceed 8.5 dB measured at 10
            MHz, or 6.0 dB measured at 5 MHz.

3. Velocity of Propagation
      The minimum required is 65% of C at 20 degrees Centigrade.

4. Edge Jitter, Untapped Cable
      No more than 8.0 ns in either direction at the receiving end
      when 185 meters is terminated at either end and is driven at
      one end with pseudorandom Manchester encoded binary data from
      a data generator that exhibits no more than 1.0 ns of edge
      jitter in either direction on half bit cells of exactly 1/2
      BT.
5. Transfer Impedance
      At 10 MHz, the impedance is 100 milliohms/meter

6. Cable DC Loop Resistance
      The sum of the center conductor resistance plus the shield
      resistance, measured at 20 degrees Centigrade, shall not
      exceed 50 milliohms/meter

7. Center Conductor
      Stranded, tinned copper with an overall diameter of 0.89 +/-
      0.05 mm

8. Nomenclature of Cable
      RG58/au or RG58/cu

It is not advisable to mix cable types or cable from different
manufacturers in any single network.

IEEE 802.3 10BASET TWISTED PAIR CABLE CHARACTERISTICS

1. Maximum Segment Length:    100 meters from concentrator to node

2. Maximum Segment Loss:      11.5dB total for all wire and
                              connectors

3. Maximum Segment Delay:     1000 ns

4. Maximum Segment Impedance: 85 to 110 ohms, averaged over 5.0 to
                              10 Mhz

5. Maximum 10BASET Network:   5 sections through 4 concentrators

6. Maximum Mixed Network:     Up to 3 thin/thick net and 2 10BASET
                              sections using 4  concentrators /
                              repeaters

7. Maximum Mixed Foirl:       With 5 sections, Foirl segments
                              limited to 500 meters each.
                              With 4 sections and 3 concentrator
                              /repeaters, Foirl segments limited to 1000
                              meters each.

GENERAL CABLE INFORMATION

In no instance is flat phone cable ("silver satin") an acceptable
cable.

A network Segment is defined as all of the cable and computers
between two terminators.  An Ethernet repeater and an Artisoft two
megabit hub act as terminators.  Note that the Artisoft
2Mbps Hub does not act as a terminator unless it is properly
configured to do so by leaving all 6 jumper pairs on and using
every other harmonica port.