NTP 4.26 Detailed procedures for busying out equipment in a DMS office are found in the POP, NTP 297-1001-500. 5. EXTERNAL MAINTENANCE FACILITIES MANUAL TRUNK MAINTENANCE 5.01 Manual trunk maintenance is performed in the trunk maintenance center in the DMS office or at any external location with access to the DMS machine. Tests can be performed on terminal circuits and on their associated transmission and signalling facilities to a distant office. Terminal circuits include the following: a) incoming and outgoing trunks b) 2-way trunks c) digit receivers d) test equipment e) special circuits (conference, recorded announcement, etc.) Trunk maintenance functions that can be performed include: a) terminal status monitoring b) call tracing DMS 100 FAMILY MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION (c) NORTHERN TELECOM LIMITED, 1978 NTP 297-1001-107 PAGE 12 PREL., ISSUE 01D01 June 22, 1978 c) terminal status modification d) manually controlled tests applied on a step by step basis with result checking at each step. e) Automatic diagnostic tests. 5.02 The interface between Telco personnel and the trunk maintenance system is the MAP. A MAP dedicated to trunk testing is called the Trunk Test Position (TTP). The full range of trunk tests, including those requiring external test equipment, can be performed at the TTP, or at a general maintenance MAP having access to test trunks. Trunk maintenance not requiring external test equipment can be performed from any general maintenance terminal from which trunk testing is allowed. 5.03 A detailed description of trunk maintenance is given in NTP 297-1001-116 DMS 100 Family Manual Trunk Testing Description. Detailed trunk test procedures are contained in the POP, NTP 297-1001-500. TEST TRUNKS 5.04 Incoming test trunks are provided for the use of a distant office in testing it's outgoing facilities into the DMS office. The common toll network test trunks provided are: 100 - balanced termination; 101 - communications; 102 - milliwatt; 103 - supervisory; 104 - transmission and noise; 958 - communicating. The 103 - supervisory test trunk function is software simulated; therefore, no trunk need be provided. AUTOMATIC TRUNK TESTING 5.05 The Automatic Trunk Test (ATT) system performs automatic maintenance tests on outgoing trunks, the outgoing portion of 2-way trunks, and on trunk signalling and transmission facilities from the DMS office to a distant office. The setting up and taking down of connections, the control of the ATT system and the actual testing is performed by software. The tests are performed automatically and the test results are output on the specified device or logged by the Routing and Reporting system. The tests DMS 100 FAMILY MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION (c) NORTHERN TELECOM LIMITED, 1978 NTP 297-1001-107 PAGE 13 PREL., ISSUE 01D01 June 22, 1978 performed are the standard test line sequences. 5.06 Requests for ATT tests are initiated by sources external to the ATT system, or by the ATT system itself. These sources include: a) Telco personnel b) remote test centres c) Call processing d) system analysis programs e) trunk group test timetable (Telco modifiable) Depending on the type of request, the following request categories are provided: a) Manual - performs automatic tests on trunks requested by Telco personnel. The request can include the test type, the trunks to be tested, and how the test should be run. b) Remote - Performs tests on request from external sources such as automatic test systems or remote maintenance centers. c) System - Performs test on outgoing trunks randomly selected by the system. d) Periodic - Performs tests on outgoing trunk groups as specified by their test frequency period. Tests in each of these categories are performed independently of each other and all categories can operate simultaneously. 5.07 The tests performed by the ATT system are as follows: a) Operational - These are test line tests to the distant office operational test line. These tests give reasonable assurance that the trunk signalling circuitry functions properly on a normal call. b) Transmission - a test line test to the distant office DMS 100 FAMILY MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION (c) NORTHERN TELECOM LIMITED, 1978 NTP 297-1001-107 PAGE 14 PREL., ISSUE 01D01 June 22, 1978 transmission test line. It ensures the trunk and it's associated facility meets Telco transmission requirements and the signalling is in good operating condition. c) Call-Through - A test line test to any distant office termination specified by the called number. d) Miscellaneous - Tests on trunks within the same office on which an automatic test can be performed. The trunks tested include: announcement trunks, miscellaneous circuits, test lines, and test equipment. 5.08 Tests can be requested on an individual trunk or trunk group, on several selected trunks or trunk groups, or on all trunks located on a specified Trunk Module (TM). Trunks that fail tests are made system Busy (SB). Telco personnel can request a list of SB trunks. Generally, no more than one quarter of the trunks in a trunk group can be made SB as a result of failures. Trunks in service can be camped-on for a Telco specifiable length of time before a test request is abandoned. If the trunk becomes idle before the timeout occurs, the ATT system will seize it and perform the requested tests on it. 5.09 For more details on ATT, refer to NTP 297-1001-121 DMS 100