AT&T 555-600-736 manual Administration, Considerations

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ADMINISTRATION

To properly administer a MERLIN LEGEND system at the time of initialization requires that care be taken during the planning phase of the sales activity. This is especially true if the system is to connect to a number of different trunks and lines, such as DID, Tie, or ISDN. in addition to using local CO Loop-start and Ground-start lines. To assist in the planning of the system, sample, filled-in copies of the planning/administration forms are available. They can be found in the LEGEND PBX System Planning Manual (555-610-113), and the Key System Planning Manual (555-610- 112). These forms should be reviewed before starting to complete an actual set of forms for customers’ systems.

Also, keep in mind, that any MERLIN LEGEND CS configuration that requires the use of T-1 and/or PRI trunks, must be reviewed by the NSAC. The Planning Manuals contain directions for sending the appropriate forms to the NSAC.

CONSIDERATIONS

Special care must be taken when planning and ordering trunks and lines for the MERLIN LEGEND CS. The most important aspect which the planner must keep in mind is that it is critical to investigate what services the local interconnect company can provide. For example, if a Behind Switch system is to be connected to a telephone company Centrex switch, the Central Office must be able to provide Loop Start lines capable of sending a disconnect signal. Otherwise the Legend system will ultimately hangup as more and more trunks are considered in use because no disconnect signal was received by the system.

Also, keep in mind that the use of Ground Start Centrex lines are not supported by the LEGEND system. So ensure that the CO does not include any GS lines in the block of Centrex lines it assigns to the Legend system.

-When consulting with the Central Office regarding Lines and Trunks, also determine the proper timer setting for the disconnect signal from the CO.

When ISDN applications are being considered, the networking should be through an AT&T 4ESS switch (Generic 13 or higher), operated by Network Systems in order for the customer to obtain the largest selection of ISDN services. However, the MERLIN LEGEND Communications System also will operate properly when connected to a telephone company 5ESS switch.

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Contents AT&T Merlin Legend Communications System Application Notes Page Merlin Legend Trunking Concepts Application Note Index TIP and Ring Explained Introduction to Trunking ConceptsLines and Trunks LOOP-START Trunks Operations Problem of Glare LOOP-START Trunks POTENTIAL-PROBLEMSAutomated Attendant Ghost Calls and Loop-Start Facilities Proper Loop-Start Facility Applications LOOP-START Trunks When to USE LOOP-START TrunksUnavoidable Loop-Start Facility Applications Cost GROUND-START Trunks Operations GROUND-START Trunks When to USE GROUND-START Trunks GROUND-START Trunks Potential ProblemsDirect Inward Dialing did Trunks Operational Characteristics Types of Loop Reverse-Battery Signaling Did Trunk Signaling CharacteristicsAdministration Considerations in Using did Trunks TIE Trunks When to USE did TrunksSimple Tie Trunk Operation Tandem Tie Trunk Operation TIE Lines Signaling and ImplementationTransferring Calls P E Transmit C E I V E ON-HOOK OFF-HOOK OFF Premises Stations Page Overview and Operations DS1 ServicePotential Problems/Limitations DESIGN, Signaling & ImplementationDo GBS Customers Need T-1? Data Communications EquipmentChannel Service Unit CSU Multiplexer MUX Isdn DS1 Facility ServicesSDN SID/ANI Special HOTEL/MOTEL Trunks Maintenance and TroubleshootingOperation Overview Hardware Module LINE/TRUNK Station Type Specifications TTR Trunk analog voice Reusable Modules from Merlin II R3 Considerations AdministrationReferences
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