Vtc Interface Connector - Data General AViiON Series Customer Documentation

External Device Connector Pin Assignments

VTC Interface Connector

The VTC controller provides a standard IEEE 802.3 local area network interface
through a 15-pin sub-D connector. This connector accepts an Access Unit Interface
(AUI) cable. The AUI cable connects the computer to an external Media Attachment
Unit (MAU). The MAU contains the Ethernet transceiver and the Media Dependent
Interface (MDI) for connection to the physical network. Figure C–3 shows the
signals and pin numbers for the VTC external connector.
Pin 15
Pin 8
Pin 1
Pin 9
VTC connector to LAN
(female)
C-6
Pin Circuit Name
1 CI–S
2 CI–A
3 DO–A
4 DI–S
5 DI–A
6 VC
7 CO–A
8 CO–S
9 CI–B
10 DO–B
11 DO–S
12 DI–B
13 VP
14 VS
15 CO–B
The connector shell acts as a protective ground
Figure C–3 VTC Connector Signals
(Control In circuit shield)
(Control In circuit A)
(Data Out circuit A)
(Data In circuit shield)
(Data In circuit A)
(Voltage common)
(Control Out circuit A)
(Control Out circuit shield)
(Control In circuit B)
(Data Out circuit B)
(Data Out circuit shield)
(Data In circuit B)
(Voltage plus)
(Voltage shield)
(Control Out circuit B)
014–001867