Error Message - 'Synchronous Port Connection Error - Digital Equipment MUXserver 100 Reference Manual

4.3.3 All Indicators OK - Che(:k Composite Link Parameters
Problem Incorrect link parameters
Correction: Log in to the supervisor port of the DECmux II and/or
MUXserver 100 at each end of the failed composite link. Use the
'SYSTEM' command to check the following parameters.
• Speed
• Long Line Drive (RS-422) or RS-232
• If RS-232, is MODElVl enabled?
NOTE
The parameters must be identical and match exactly the character-
istics of the modenlS used for RS-232.
• Is the DECmux II configured as SLAVE and the MUXserver
100 configured as MASTER?
NOTE
If two DECmux II units form the failed composite link, both must
be configured as SLAVE.
This procedure checks the programmed settings only. The MUXserver 100 also
requires DIP switch settings to change from the default setting of RS-232. See
Chapter 2, Section 2.5 (SETTING UP THE COMPOSITE LINK
PARAMETERS).
4.3.4 Error Message - 'Synchlronous Port Connection Error'
Problem Following the start-up procedure, the above error is displayed on the
terminal connected to the supervisor port.
Correction: This message is given if the DECmux II unit or
MUXserver 100 detects an illegal network connection. Most common
cause is a loopback connector left connected to a composite link port
or a modem set to loopback mode.
CHAPTER 4 MUXserver 100 TROUBLESHOOTING 23