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ATT-TP-76450
Common Systems Equipment Interconnection
Standards for the ATT Local Exchange Companies
and AT&T Corporation
Abstract
Presented in this document are the Common Systems Equipment Interconnection
Standards for equipment placement and interconnection in the ATT LOCAL EXCHANGE
companies Network. Users of this document should note that requirements and
information contained within may only be excerpts of full requirements necessary for an
acceptable install
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 GENERAL 1.1 Requirements This document provides the requirements for interconnection of new equipment in the AT&T Local Exchange Carrier and AT&T Corporation networks. The appendices include the ATT equipment evaluation process to be used to verify compliance to
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 If the product uses various components that are interconnected together, document will be applicable for interconnection between the various external components and cabling in addition to stand-alone Common Systems components that may have been standardized with other
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 • TP 76300, AT&T Installation Requirements • TP 76400, AT&T Design Engineering Requirements 1.8 Adherence to AT&T Standard Suppliers Within the Common Systems Checklist, standard corporate providers of the product are listed as applicable. Selections of this p
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 2 DC Power Interconnection Standards 2.1 GENERAL 2.1.1 Nominal -48v DC Nominal –48v DC is the standard platform for power delivery to any Network Element (NE). Manufacturers should comply with this requirement by providing their equipment internally with va
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 2.1.3 Battery Return Conductor 2.1.3.1 Each power feeder shall have its own battery return conductor. This design concept shall also carry through directly to each piece of equipment. 2.1.3.2 Equipment configured with the battery return and chassis ground
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 This section describes the various acceptable DC power connectors and connections that are approved for use within AT&T. See Table 2-1 for a classification of acceptable power connections based on cable termination. 2.2.1 Location of Power Terminations 2.2.1.
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 product. This termination or barrier strip should be able to accommodate a ring lug connectors that comply with the UL, CSA and Mil Spec listings. 2.3.3 18 AWG Power Cable and Smaller For applications where the size of wire supplying power to the equipment is 18
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 2.5 Fusing of Capacitors Equipment incorporating the use of power distribution apparatus which uses capacitors shall be fused to protect the power distribution bus from a shorted capacitor. Fuse and protection information must be provided in the supplier's respons
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 Circuit Breakers - Only thermal magnetic and magnetic type DC circuit breakers are acceptable. Circuit breakers should adhere to all applicable UL and ANSI standards. DC Circuit breakers that are labeled 100% are full load rated and may be sized at the same capacity as
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 As an exception, there are some new network elements that employ high DC current demands that when collectively configured in a packaged bay arrangement may exceed available fuse position capacities found at the BDFB. In a method to utilize the existing AT&T - DC distri
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 3 Synchronization/Timing Standards The Building Integrated Timing Supply (BITS) concept is the method of providing Phase and Frequency synchronization. The BITS plan details that each office have one Primary Reference Source (PRS)/(Stratum-1) traceable office mast
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 office BITS, with primary and secondary DS1 (or Composite Clock) reference signals from separate T1 (DS1) or Composite Clock (CC) output cards, with odd-even slot, alternate group assignments. The ability to access, test and validate timing is critical to maintaining a
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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
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 (TBOS/TABS) E2A Discrete Least Preferred Footnote: A discrete telemetry interface may be provided, on an optional basis, in addition to higher level interfaces, to provide a summary of alarm and status information for remote surveillance. 4.6 Alarm Interconne
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 4.11 Housekeeping/Overhead Alarm Inputs All network elements that will be deployed in a non-central office environment, such as RT, CEV, Cabinet, etc., that are intended to carry local power and environmental alarms to a surveillance center must have at minimum s
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3.0" Diameter Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 5.7 Minimum Distance Between Connector Housing and 90 Degree Bend Minimum Fiber distance away from a connector housing to bend 90 degrees shall be 3.75- inches. See Figure 5–1. Figure 5-1 3.75" 2.25" 1.5" Radius 5.8 Space Between Door/Panel and
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 5.13 Maximum optical power levels Optical aggregate power level must not exceed +16.8 dBm optical power level at any connector (Hazard Level 3b). If the product exceeds this, there must be an embedded (to the network equipment) solution to protect the human exposure
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 6.4 DS1 Cross-Connect Wire DS1 Cross-Connect Wire (Violet/Red) shall be special high twist Wire to mitigate spectrum interference with DSL Wire (Violet/Blue). 6.5 DSL Cross-Connect Wire DSL Cross-Connect Wire (Violet/Blue) with Different turns than DS1(V
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Common Systems Connection Standards AT&T Services, Inc Date: August 31, 2007 ATT-TP-76450, Issue 9 Wire and Cable with UL Flammability Ratings of CMX and CMU must not be used within AT&T central offices as UL Flammability Ratings must be MP/CM(same floor), MPR/CMR(Riser- Between Floor) or MPP/CMP(Plenum Condition). 6.11 Central Office Copper Wire and Cable F
