Special Dtc Terminology - HP 9000 Series 700 Manual

Special DTC terminology

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Special DTC terminology
The following specialized terms are used in this manual.
Board and card
The terms board and card are used in this manual to mean the same thing. For the
DTC 16 and DTC 48, the term card is employed, for example, SIC (Serial Interface
Card) or connector card. The DTC 72MX and, in general, all other DTC types now
use the term board.
CPU/LAN or LAN processor board
Each DTC has a processor board that handles the overall management of the DTC.
The processor board is the central processing unit (CPU) of the DTC and contains
the firmware and downloaded software responsible for much of the data
communications processing done by the DTC. It also provides the DTC with its
connection point to the LAN via an attachment unit interface (AUI) cable and a
medium attachment unit (MAU) for ThickLAN connection, or a BNC T-Connector
for ThinLAN connection.
In the DTC 16 and DTC 48, the processor board on the DTC is called a CPU/LAN.
In the DTC 16TN and DTC 72MX, the processor board on the DTC is called a LAN
board.
Port groups
In the DTC 16TN and DTC 72MX, the ports are grouped into port groups. Each
port group has eight ports. The DTC 16TN has two port groups, and the DTC 72MX
has three port groups per board. Each port group can be modem or direct-connect. A
port group corresponds to a connector on a board of a DTC 72MX or to a connector
on a DTC 16TN.
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