ACC Installation and Configuration Guide

44 Chapter2
Software Installation and Verification
Installation Verification
Loopback Configuration Requirements
The ACC product provides a loopback protocol module (PORTTEST)
which is included in the download file. This can be used to run a loopback
test which exercises the ACC multiplexer card, any atta ched multiplexer
interchange panel or cable, and the specified multiplexer port. The
loopback test is run using the loopback test feature (the lb command of
the zmntr utility. (See the ACC Utilities Reference Guide.)
The test requires the following:
• At least one ACC Mux card must be installed into t he system, and it
must have a multiplexer interchange panel (or output cable if the
card is 2-Channel) attached.
• The ACC product must be installed and the system must have b een
rebuilt and rebooted.
The external loopback test, which can be used to test a specific port,
requiresthataloopbackhoodbeattachedtothatport.(Ifaloopback
hood is not available, an internal loopback test can be run which just
exercises the interface card.)
• For dual interface configurations, only one ACC multiplexer card
should be attached to the multiplexer panel at a time.
NOTE The 4-channel E1/T1 and 8-channel PCI ACC cards do not require any
configuration to perform the ZMNTR "LB" loopback test, with the
exception that a loopback hood must be connected to a port in order to
run an "External" loop test. This section of the manual does not apply for
these card types.