AT&T 76450 manual TL1 / TCP-IP

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Common Systems Connection Standards

AT&T Services, Inc

Date: August 31, 2007

ATT-TP-76450, Issue 9

Footnote: The term "Network Element" is used within this document to refer to any and all equipment other than switching equipment deployed in a CO or remote location. This would include, but is not limited to transport, conditioning, power and testing equipment as well as environmental and building operations sensors.

4.3Separation of Local Alarms

•Local alarms must be separate alarm outputs from the telemetry alarms. At a minimum this would be a Major (MJ) and Minor (MN), both audible and visual. The visual alarm output must be designed so it cannot be disabled with an alarm cut-off (ACO).

4.4Audible Alarm Cut-off (ACO)

A local control button shall be provided for local office audible alarm cut-off (ACO).

•A local control button shall be provided for local office audible alarm cut-off (ACO).

•The ACO function shall simultaneously silence all active office audible alarm indications.

•The ACO function shall not inhibit office visual alarms, or subsequent audible indications due to additional failures.

•If all previous alarms have been ACO’ed, and a new alarm becomes active, then the ACO condition shall be cleared and the highest severity audible alarm contact shall be activated.

•An amber LED shall be associated with the ACO button to indicate the current status of the ACO. If active office audible alarm indications are cut-off due to execution of the ACO, the ACO LED shall be lit indicating that the alarm condition exists and that all active alarms of the system have been ACO’ed. The ACO LED stays extinguished if there are no active alarms when the ACO is executed. The ACO LED is extinguished when all active alarms clear, or when a new alarm is activated in the system, thus clearing the ACO condition.

•As an optional feature, equipment may provide capabilities to remotely activate the ACO function.

4.5Telemetry Alarm Protocols:

Table 4-1 is included for reference only.

Table 4-1

TL1 / TCP-IP

Most Preferred

TL1 (sync) X.25

Second Most

 

Preferred

TL1 (async)

Third Most Preferred

BACnet/Modbus/LonT

Fourth Most

alk

Preferred

E2A Serial

Fifth Most Preferred

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Contents Canceled/Superseded Doc N/A Scope RequirementsPurpose Pre-assembled versus Field Assembled Network EquipmentATT-TP-76450 Internet Web Site Product Evaluation Process Additional AT&T RequirementsReasons for Reissue Adherence to AT&T Standard SuppliersPower Feeds AC Powered EquipmentRedundant Power Feeds Nominal -48v DCList 1 Drain Battery Return ConductorDrain Definitions List 1X DrainTwo Hole Connections Location of Power Terminations1 16 AWG Stranded Power Cable and Larger Size conductor Acceptable termination Associated Listings 3 18 AWG Power Cable and SmallerVisual Power Alarms and Status Indicator Fusing of Capacitors Power Distribution DeliveryIndividually Mounted PDU NE Integrated Power DistributionDirect Bdfb Power Delivery Standards Clock output lead cabling Synchronization/Timing StandardsTermination of timing leads Redundancy of timing inputsAlarms Output card exhaustionTL1 / TCP-IP TBOS/TABS Fiber Fiber AttenuatorsSee Figure Copper DS1 Cross-Connect Wire Central Office Copper Wire and Cable Protection of Cable and Jumpers Vendor DocumentationUnusual Cable Types Softcopy DocumentationCraft Interface Instructions Alarm/Trouble Shooting GuideHard Copy Documentation Personnel Injury and Equipment Damage WarningsRevision Numbering Consistent Terminology throughout DocumentationConsistent Terminology between Documentation and Platform Revision HistoryEquipment lighting Other interconnection requirementsList of Documentation Test Streaker CardsProcess Appendix a ATT-TP-76450 Checklist Instructions and ProcessInstructions Page Power Interconnection Standards Alarm Standards Vendor Documentation Part & N/A Footnotes Rqmt# CommentAppendix C References Document Number Document DescriptionAppendix D ATT Contact List Appendix E Acronyms
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