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Section 9, ATT-TP-76400 DETAIL ENGINEERING REQUIREMENTS
AT&T January, 2012
termination point there by providing cross-connect capabilities between any two terminations
or appearances.
7.1.4 All Operation/Administration/Maintenance (OA&M) connections shall be direct connected to
one another and will not utilize the cross-connect architecture/design of the Fiber and Copper
Distributing Frames unless otherwise noted in this document, an associated GES Application
Drawing or as outlined in ATT-TELCO-IS-002-316-076 Common Systems: Ethernet
Architecture Standards
Note: The OAM Direct Connect Application may not apply in all locations due to existing
network architecture designs. (i.e. Mobility Network Technology Centers (NTC’s) where the
cross-connect architecture is common place and should be maintained)
7.2 Electrical Ethernet Distributing Frames
7.2.1 EDF design is suitable for use in both large and small central offices and customer premises.
7.2.2 All new Electrical Ethernet installations shall conform to NEBS requirements as described in
ATT-TP-76200.
7.2.3 The minimum Electrical Ethernet provisioning shall conform to Category 5E cable restrictions
and length limitations.
7.2.4 Ethernet interconnection between network transmission equipment and the EDF will be
terminated on the rear of an Ethernet Termination shelf (Patch Panel). This connection will
be made using RJ-45 type connectors and Category 5E minimally conforming type cable.
7.2.5 The cross-connect termination between the originating C.O. transmission equipment and the
customer’s far end receiving equipment will be connected via cross-connect jumpers at the
time a service request is initiated.
7.2.6 The cross-connect between the originating C.O. transmission equipment and the customer’s
far end receiving equipment will be made in a front to front arrangement via RJ-45 type
connectors and Category 5E minimally conforming cable at the EDF.
7.2.7 The EDF shall always utilize the cross-connect methodology. The interconnection of
originating Ethernet equipment to the far end termination point within the Carrier
Communications Space will be through the full cross-connect design of the Ethernet
Distribution Frame.
7.2.8 Under no circumstances will C.O. Ethernet equipment be directly terminated on the front
access ports of the customer's far end termination panels but, shall be terminated on the rear
of said panels and will be subsequently cross-connected via a patch panel at the EDF.
7.2.9 10/100 Base-T Ethernet circuits require the use of Cat5E minimally conforming cable in order
to meet satisfactory transmission levels at 100 meters. 1000 Base-T (1Gig) circuits require
the use of Cat6 minimally conforming cable in order to meet satisfactory transmission levels
at 100 meters. Due to restrictive length limitations of Cat 5/5e and Cat 6 twisted pair cable,
when the placement of Ethernet Equipment is such that the end to end distance between the
termination points is greater than 100 meters (328ft), the use of Media Converters should be
employed. Media Converters shall be deployed in pairs, one at the originating end and one at
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