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Option 242 Specifications
Table 1-2. ThickLAN Specifications
Features
Compatible with IEEE 802.3 Standard for access to O.4-inch diameter baseband coaxial cable.
Carrier-Sense Multiple Access with Collision Detection (CSMA/CD) protocol controls network
access using no master node.
On-board node self test that checks the operation of the node hardware including the AUI and
ThickMAU.
Every node on the network cable is accessible by any other node on the network with no store
forward.
10 Megabit-per-second hardware data transfer rate.
Each SOO-metre cable segment supports up to 100 nodes.
VLSI implementation for reliability and lower cost.
Microprocessor off-loads host computer and gathers network statistics.
Electrical Characteristics
Date Rate: Transmitted in bursts of 10 Mbits/sec.
Maximum Coaxial Cable Length: 500 metres for one segment.
Maximum Distance from Node to Network Trunk: 48-metres maximum for external AUI cable.
Required Distance Between Taps on coaxial Cable Trunk: Each ThickMAU with its cable tap
must be located on the coaxial at a position that is an exact multiple of 2.5 metres from the end
of the cable. The coaxial cable available from HP is marked every 2.5 metres to show where
ThickMAUs may connect.
ThickMAU Coaxial Cable to AUI Cable Isolation
+/-707V DC. SOOV AC RMS. 50/60 Hz
Will conduct repetitive surges of up to 4A without damage (between the shields).
General Information
1-8
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