IBM 5280 Technical Newsletter page 132

863
DDSA CABLE DIAGRAM (continued)
Comm
Comm DDSA
Comm
MPU Wrap
MPU DDSA
Wrap DDSA DDSA Line Names MPU
CArd Conn Conn
Card
Card Level 2 Card (See Note 2)
Card E5J01 J140 Level 3
Probe Points
Line Name Line Type
e
e
•
G
•
G
-data term rdy
Transmit
E7802
Note 1
-data set rdy
Receive
E7813
07813
+-
-rate sel
Transmit
E7B04
Note 1
-xmit elk
Receive
E7B07
07B07
+-
, -ree elk
Receive
E7B08
07808
+-
-sel standby
Transmit
E7B03
Note 1
-ring ind
Receive E7012
Note 1
+-
-req to send
Transmit E7002
07002
]
-clear to send
Receive E7013
07013
",
-carrier det
Receive
E7812
07812
-test control Transmit
E7B05 07805
:J
-test ind Receive
E7010
07010
+xmit line data
Transmit
E7004 07004
] 08802
+xmit nonsw data
ESB02
03 13 ~
OS005
-xmit nonsw data
ES005 04
14
+ree line data Receive
E7810 07810
OS009 +rec nonsw data ESB09 01 10
OS013 -rec nonsw data ES013 05 12
-5V
Power E5806 07806
E7806
+S.5V
Power E6811 OS811
ES811
-8.5 V
Power Note 1
Notes:
1. This line.is not used by the OOSA card.
2. The OOSA card converts transmit signals to DOS standards for transmission by the DDS network. The OOSA card
converts received DDS signals to IBM 5285 VTL signal levels.
3. All 003 board pins are at +5 V level. All 008 board pins are signal ground.
DDSA
Cable
Conn
•
5
6
3
4
863
Communications Cable Diagrams 147