Isdn Connector Pin Assignments; Serial.bus; Isdn Connector - DEC Personal DECstation 5000 User Manual

D.5 ISDN Connector Pin Assignments
The external ISDN connector is an 8-wire Modular Jack (RJ45). Pins 1,
2, 7, and 8 are not used. A four wire cable with 2 twisted pairs would be
connected from this jack to an ISDN NT or PAXB card for ISDN voice and data
connections. The following table shows a pinout for the ISDN connector.
Table D–5 ISDN Connector
Pin Signal
1
2
3 LOUT1
4 LIN1
5 LIN2
6 LOUT2
7
8
D.6 SERIAL.bus
The SERIAL.bus uses a 4 pin shielded MOLEX SEMCONN or AMP SDL
modular type connectors. The MOLEX version will be unkeyed. The AMP
version will have key ''D.'' This provides compatibility between the AMP and
MOLEX part.
Data and power for the SERIAL.bus are transferred over low capacitance
4 wire shielded cable. The four conductors are used for: GND, SDA, SCL,
and +12V (pins 1 through 4 respectively). Capacitance of the SCL and SDA
conductors shall be less than 70pF/m (capacitance between one conductor and
other conductors connected to shield). The S.b connector is located at the rear
of the system enclosure and mounts to the base system module. The following
table shows the pinout for the SERIAL.bus.
D.5 ISDN Connector Pin Assignments
Function
No connection
No connection
Line output (-)
Line input (-)
Line input (+)
Line output (+)
No connection
No connection
Connector Pin Assignments
Connector Pin Assignments D–7