Trouble Shooting a DCC Connection

by Johannes Helmig [Published on 14 Feb. 2000 / Last Updated on 14 Feb. 2000]


The DCC host is running:


You start then DCC on the "Guest":

It starts to establish the connection, you see on the Host and/or Guest
the message of "Verifying username and password":


but then you get:


It is time to check your setup / configuration :

If you use a Serial Direct-Cable connection, you have to check it yourself manually step-by-step.


If you use a Parallel Direct-Cable connection , then one of the easiest ways to trouble shoot
a DirectParallel® DCC connection is to use the "DirectParallel® Connection Monitor" from
Parallel Technologies (the creators/developers of the DirectParallel® DCC drivers licensed to Microsoft)

DirectParallel® Connection Monitor (DPM) Diagnostic, Troubleshooting and Testing Utility For Direct Cable Connection (DCC)

One of the easiest ways to trouble shoot a DirectParallel® DCC connection is
to use the DirectParallel® Connection Monitor from Parallel Technologies
(the creators/developers of the DirectParallel® DCC drivers licensed to Microsoft).
DirectParallel® Connection Monitor (DPM) is a very useful utility for diagnosing, troubleshooting and testing the Direct Cable Connection (DCC) feature in Windows 95/98. It has a built-in DCC Wizard for showing what is wrong with your DCC setup and recommending possible corrections. 
It shows the data connection and possible data transfer speeds for PC to PC File Transfer and Networking. And it shows the parallel port type, I/O Modes, and cable type used for the connection. 

It is very helpful in setting up, troubleshooting and testing DCC connections ... Determining why your connection may not be working or is running slower than you expected ... And seeing how fast your DCC connection really is.

Download DPM now from Parallel Technologies ... The creators/inventors/developers of the PC to PC DirectParallel® technology licensed to Microsoft for Windows Direct Cable Connection (DCC).

DCC Wizard ... Diagnostic and Trouble Shooting Information

ΠThe DCC Wizard provides diagnostic and trouble shooting information to help determine why the DCC connection may not be working.

Just run a test and if this DCC Wizard button is flashing RED, then it has detected a potential DCC connection problem and you can click on the DCC Wizard button to find out what might be wrong.

Local Computer Parallel Port and Other Information

Clicking on the Local Computer Eyeglass icon will display the Driver Diagnostic information for the Local Computer.
Ž Clicking on the Local Computer icon will display the configuration information of the Local Computer
These icons show what Parallel Ports are installed on the Local Computer ... LPT1:, LPT2:, and LPT3:

Clicking on the Local Computer Parallel Ports icon will display the Parallel Port Information for the Local Computer

Remote Computer Parallel Port and Other Information

Clicking on the Local Computer Eyeglass icon will display the Driver Diagnostic information for the Local Computer.
Clicking on the Local Computer icon will display the configuration information of the Local Computer
These icons show what Parallel Ports are installed on the Local Computer ... LPT1:, LPT2:, and LPT3:

Clicking on the Local Computer Parallel Ports icon will display the Parallel Port Information for the Local Computer

Raw Data Transfer Rates, Cable Information, Etc...

The Cable icon shows which Parallel Ports have successfully made a connection, what type of cable is connected, and the I/O Mode the PCs are using to communicate.
This is the Data Transfer Speed display ... Data Transfer Speed is shown in Kbytes/Sec and in Bar Graph form.
This is where the various diagnostic and other information is displayed.



To check a serial Direct Cable Connection


Verify, that on the DCC Guest the
"Browse Master" is Disabled
and on the DCC Host Enabled.


Did you configure on
both the DCC Host
and Guest the speed
of the connection to
the same value ?
Check also the
speed of the COM-
port, I also changed
the speed to the
required value on
BOTH systems.

NOTE: although not shown by Win95/98: after changing the speed of the COM-port
or Serial Cable Modem:
REBOOT the system for the change to take effect !
(It did NOT work on my systems without a reboot)


If it "hangs-up" immediately:

check that you have on both systems the same Network-protocol installed, otherwise the systems cannot talk to each other !


You can create a Log-file for the Serial-Modem, which
is activated in the Properties of the "Serial-Cable Modem",
tab: Connection, under "Advanced":


In Win98, there is even a button to view the Log (I did NOT find the
Log-file on Win95):


This was an example, where the cable was good, but the Browse-Master
settings were wrong, so the connection was immediately terminated.

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