The terminal balance function of the ROTL involves connecting a tone-and-quiet source to a selected outgoing trunk
from the ROTL central office. Upon receipt of the same information as a transmission test, except for a different
request code, a call is originated by the ROTL over the selected trunk. When the call terminates, a 1000-Hz start
test tone burst is expected by ROTL. After it occurs, the tone-and-quiet source is attached to the trunk in the ROTL
office. This source provides 10 seconds of 1004-Hz (0 dBm) tone followed by a 30-minute period of quiet balance
termination during which balance measurements or adjustments can be made at the far end of the CAROT trunk or
line. The test is terminated by receiving a disconnect on the trunk under test. After 60 seconds of quiet termination,
the ROTL is no longer associated with this test, and a recycle signal from the test center will have no effect. Prior to
this, a recycle will be accepted.
7.4.5 CONNECTION APPRAISAL TEST
The Connection Appraisal feature provides for conducting a transmission test on a connection setup from the
5ESS
®
-2000 switch office to a test line in a distant office with normal routing and trunk selection. More than one
trunk may be used in a built-up connection. The directory number of the far-end transmission test line is included in
the priming information. When priming is complete, a test line in a far-end office is dialed up. When the test line is
seized, the test sequence proceeds in a manner similar to a routine transmission test.
For a connection appraisal test, the ROTL originates a call in a subscriber-like manner by using digits contained in
the priming information sent from the control location. The sequence of signals is identical to that for trunk
transmission tests with the following variations:
Call processing trunk hunting mechanisms are used to determine the trunk to be used for the call.
There is no monitoring for supervisory hits.
The overall connection, instead of a particular trunk, is measured.
There is no make-busy capability.
7.5 OFFICE DEPENDENT DATA REQUIREMENTS
Office dependent data is required in the
5ESS
®
-2000 switch for the ROTL feature. The CAROT accesses ROTL
through the DDD network by dialing a directory number assigned to ROTL which will terminate at test software in the
5ESS
®
-2000 switch. Since a directory number is assigned to ROTL, the ROTL directory number must be associated
with a unique route index. A route index defines how a call is to be routed. The route index associated with the
ROTL directory number routes to a trunk group of ROTL test ports. The ROTL test ports must be assigned in the
switching modules with transmission test functions.
The
5ESS
®
-2000 switch data base must contain the callback directory number of the CAROT and any directory
number of authorized manual location(s) for the ROTL security callback. The ROTL security call is described in Part
7.3.3 of this section. This list of authorized locations must be defined in the
5ESS
®
-2000 switch. The list also
contains the authority for each directory number (none, manual, or automatic). The "none" maintenance test mode
inhibits any and all callers from a given CAROT from changing the trunk status of the tested trunks. All "manual"
mode locations have the authority to remove trunks from service allowing the automatic maintenance limit to be
exceeded. The "auto" maintenance test mode indicates that the CAROT or control location can automatically
remove trunks from service if they fail specific tests. The automatic maintenance limit with the "auto" mode cannot
be exceeded. The automatic maintenance limit is established by the operating telephone company customer and
states the number of trunks that can be removed from service.
The screening index and digit analysis selector that will be used for ROTL security callback and connection
appraisal calls must be defined. The screening index and digit analysis selector are accessed during digit analysis of
ROTL calls.
235-105-210
October 1999
Copyright © 1999
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Summary of Contents for 5ESS-2000
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