
Configuring WAN Line Services
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See “Testing MCE1 and MCT1 Lines,” later in this chapter, for more information
about running BERT tests.
Enabling or Disabling Fractional T1 Loopback Detection
QMCT1 and QMCT1 w/ DS0A link modules only can detect and generate
Fractional T1 (FT1) loopback codes as specified in ANSI T1.403 Annex B.
FT1 loopback (channel loopback) is an ANSI-standard 127-octet loop. FT1
loopback detection allows remote test equipment to put one channel (logical line
or DS0 group) on any port into loopback testing mode without affecting the other
logical lines.
Disable or reenable fractional loopback detection on QMCT1 DS0s.
FT1 loopback also allows individual QMCT1 logical lines to generate and send
test patterns to the remote test equipment and verify that the pattern is received
and looped back. See “Running Logical Line Tests” in the last section of this
chapter for information about logical line testing using fractional loopback.
Accessing Line Resource Reservation
On DMCT1 net modules and QMCT1 or QMCT1 w/ DS0A link modules only,
you can edit ST2 line reservation resources if the ST2 service is enabled on the
line. For information, refer the “Managing Line Resources” chapter in
Configuring Multicasting Services.
Configuring NZRI Line Encoding
On DMCT1 net modules and QMCT1 or QMCT1 w/ DS0A link modules only,
you can configure the NRZI Enable and NRZI type parameters. Refer to
“Configuring a DS0A Connection,” earlier in this chapter.
Site Manager: BERT Test Pattern parameter: page A-39
Site Manager: Accept Fractional Loopback Code parameter: page A-39
Note: Although the DMCT1 net module does not support FT1 loopback, it
does provide BERT testing on selected DS0s, described in the “Running
Logical Line Tests,” later in this chapter.
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