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Software Vault: The Gold Collection
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Software Vault - The Gold Collection (American Databankers) (1993).ISO
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1993-04-15
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3KB
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67 lines
comTAP Serial Data Cable Specification
You must connect pins 3 and 7 (DB-25 version) or 2 and 5 (DE-9
version) to monitor data. The cross connections from DTE: 22-20 and
DCE: 22-4 (DB-25 versions) or DTE: 9-4 and DCE: 9-7 (DE-9 versions)
are optional but recommended, as they support automatic device
detection. Connect the shells labeled DTE and DCE to the MONITORING
computer. The horizontal cable at the bottom of the diagram connects
the two devices under test and should be a normal RS-232 cable.
Remember, if you are connecting two DTE devices with the RS-232
cable, you must include a null modem converter or swap pins 2 and 3
at one end of the cable.
Monitoring Computer Shells
DTE DCE
Monitoring Port Monitoring Port
Connector | Connector
|
DE-9 9 2 5 4 | 9 2 5 7
|
DB-25 22 3 7 20 | 22 3 7 4
| | | | | | | | |
+-----|-----|-----+ | +-----|-----|-----+
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | | |
| | | |
2 -----------+-----|--------------------|-----|--------
3 -----------------|--------------------+-----|--------
4 -----------------|--------------------------|--------
5 -----------------|--------------------------|--------
6 -----------------|--------------------------|--------
7 -----------------+--------------------------+--------
Connect the two devices under test with this standard
RS-232 cable. The monitoring tap connectors hook to
a separate PC with two serial ports. Monitoring is
passive - we do not use pass-through - so that timing
of the transmissions is not affected in any way.
Connections support data only; signal information is not included.
Pinout List
-------------
DE-9 | RS-232 | DB-25
---------------+----------+----------
9 | x | 22
DTE 2 | 2 | 3
5 | 7 | 7
4 | x | 20
---------------+----------+----------
9 | x | 22
DCE 2 | 3 | 3
5 | 7 | 7
7 | x | 4