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The count of Transmit Errors and Tra.nsmit timeouts should remain low. A rap-
idly increasing number of Transmit errors results from loss of transmit clock
from the modem to the MUXserver 100.
Transmit timeouts show problems with the Remote DECmux II or complete
loss of the communications links.
3.3.2 Communications
The privileged command COMMUNICATIONS (or COMM) allows the network
manager to access the sub-directory of commands 'which apply to the composite
communications links and connection to remote DECmux II units. Enter the
HELP command in response to the COM> prompt for a list of these com-
mands. See Chapter 5, Section 5.3 (COMMUNICATIONS) for details.
3.3.2.1 Status -
The STATUS command is a privileged communications com-
mand which is entered in response to the 'COM>' prompt. The status com-
mand shows the same counters as the SHOW COMMUNICATIONS command.
This command can also be executed from the supervisor port of a remote
DECmux II unit to display the link status information for the composite links
connected to that DECmux II unit.
3.3.2.2 Map -
The MAP command is a privileged communications command
which is entered in response to the 'COM>' prompt. The Heading line of the
MAP command shows the logical status of the remote DECmux II units.
A map block will be displayed for any DECmux II unit detected since the last
system load. The Positional name of the MUXserver 100 will be followed by -up
or -down. A remote DECmux II unit is considered down if there has been no
valid data from it for 20 seconds. Refer to Chapter 2, Section 2.6 (SETTING
UP THE NETWORK MAP).
CHAPTER 3 MANAGING AND MONITORING
13
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