Data General AViiON 5000 Series, Customer Documentation

Page: 162 / 210

External Device Connector Pin Assignments
C-6
014–001867
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 Circuit Name
1 CI–S (Control In circuit shield)
2 CI–A (Control In circuit A)
3 DO–A (Data Out circuit A)
4 DI–S (Data In circuit shield)
5 DI–A (Data In circuit A)
6 VC (Voltage common)
7 CO–A (Control Out circuit A)
8 CO–S (Control Out circuit shield)
9 CI–B (Control In circuit B)
10 DO–B (Data Out circuit B)
11 DO–S (Data Out circuit shield)
12 DI–B (Data In circuit B)
13 VP (Voltage plus)
14 VS (Voltage shield)
15 CO–B (Control Out circuit B)
Pin 1
Pin 8
Pin 9
Pin 15
VTC connector to LAN
(female)
The connector shell acts as a protective ground
Figure C–3 VTC Connector Signals