
Chapter 1. Introduction
1-4 IQ Probe User Manual 61200214L1-20
TELNET
Telnet provides a password-protected, remote log-in facility to the IQ
Probe. Telnet allows a user on a network manager to control the IQ Probe
through the terminal menus.
DIAL BACKUP OPERATION
The IQ Probe dial backup (DBU) option cards provide single or multiple
site backup. The IQ Probe can be configured to originate a call based on
physical layer conditions (i.e., port failures) and/or PVC outages. Once
the criteria are met, the IQ Probe establishes a call to the configured
phone number and the connection is used to carry traffic for the PVC(s)
configured for dial backup operation.
In the case of PVC outages (not physical layer port failure), the IQ Probe's
two-port design allows the IQ Probe receiving the call to continue to use
the T1 frame relay circuit for PVCs that are not affected by the outage,
while using the DBU interface for PVCs that are inactive due to the
outage. An IQ Probe with multiple PVCs to multiple sites can also
originate a call to one site during an outage and restore connection for
PVCs to that destination.
The IQ Probe's unique DBU cards are field-installable by the customer. See
Installation on page 2-1 for information on installing DBU cards. The DBU
cards are compatible with other ADTRAN products supporting DBU. The
backup options are described in the following section, Interface Card Op-
tions. Contact the local telco provider to determine which services are
available in your area. See Applications on page 4-1 for more information,
including an example of a dial backup application.
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