§ 51.319   Specific unbundling requirements.

   (a)   Local  loops.  An  incumbent  LEC  shall  provide  a  requesting
   telecommunications carrier with nondiscriminatory access to the local loop
   on an unbundled basis, in accordance with section 251(c)(3) of the Act and
   this part and as set forth in paragraphs (a)(1) through (8) of this section.
   The local loop network element is defined as a transmission facility between
   a distribution frame (or its equivalent) in an incumbent LEC central office
   and  the loop demarcation point at an end-user customer premises. This
   element  includes  all  features,  functions, and capabilities of such
   transmission facility, including the network interface device. It also
   includes all electronics, optronics, and intermediate devices (including
   repeaters and load coils) used to establish the transmission path to the
   end-user customer premises as well as any inside wire owned or controlled by
   the incumbent LEC that is part of that transmission path.

   (1)  Copper  loops.  An  incumbent  LEC  shall  provide  a  requesting
   telecommunications carrier with nondiscriminatory access to the copper loop
   on an unbundled basis. A copper loop is a stand-alone local loop comprised
   entirely  of  copper  wire or cable. Copper loops include two-wire and
   four-wire analog voice-grade copper loops, digital copper loops (e.g., DS0s
   and integrated services digital network lines), as well as two-wire and
   four-wire copper loops conditioned to transmit the digital signals needed to
   provide digital subscriber line services, regardless of whether the copper
   loops are in service or held as spares. The copper loop includes attached
   electronics  using time division multiplexing technology, but does not
   include packet switching capabilities as defined in paragraph (a)(2)(i) of
   this section. The availability of DS1 and DS3 copper loops is subject to the
   requirements of paragraphs (a)(4) and (5) of this section.

   (i)  Line  splitting.  An  incumbent  LEC  shall  provide a requesting
   telecommunications carrier that obtains an unbundled copper loop from the
   incumbent LEC with the ability to engage in line splitting arrangements with
   another competitive LEC using a splitter collocated at the central office
   where the loop terminates into a distribution frame or its equivalent. Line
   splitting is the process in which one competitive LEC provides narrowband
   voice service over the low frequency portion of a copper loop and a second
   competitive LEC provides digital subscriber line service over the high
   frequency portion of that same loop. The high frequency portion of the loop
   consists of the frequency range on the copper loop above the range that
   carries analog circuit-switched voice transmissions. This portion of the
   loop includes the features, functions, and capabilities of the loop that are
   used to establish a complete transmission path on the high frequency range
   between the incumbent LEC's distribution frame (or its equivalent) in its
   central office and the demarcation point at the end-user customer premises,
   and  includes  the  high frequency portion of any inside wire owned or
   controlled by the incumbent LEC.

   (A)  An  incumbent LEC's obligation, under paragraph (a)(1)(i) of this
   section, to provide a requesting telecommunications carrier with the ability
   to  engage in line splitting applies regardless of whether the carrier
   providing voice service provides its own switching or obtains local circuit
   switching from the incumbent LEC.

   (B)  An  incumbent  LEC must make all necessary network modifications,
   including providing nondiscriminatory access to operations support systems
   necessary for pre-ordering, ordering, provisioning, maintenance and repair,
   and billing for loops used in line splitting arrangements.

   (ii) Line conditioning. The incumbent LEC shall condition a copper loop at
   the request of the carrier seeking access to a copper loop under paragraph
   (a)(1) of this section or a copper subloop under paragraph (b) of this
   section to ensure that the copper loop or copper subloop is suitable for
   providing digital subscriber line services, whether or not the incumbent LEC
   offers advanced services to the end-user customer on that copper loop or
   copper subloop. If the incumbent LEC seeks compensation from the requesting
   telecommunications  carrier  for  line  conditioning,  the  requesting
   telecommunications carrier has the option of refusing, in whole or in part,
   to have the line conditioned; and a requesting telecommunications carrier's
   refusal of some or all aspects of line conditioning will not diminish any
   right it may have, under paragraphs (a) and (b) of this section, to access
   the copper loop or the copper subloop.

   (A) Line conditioning is defined as the removal from a copper loop or copper
   subloop of any device that could diminish the capability of the loop or
   subloop  to  deliver  high-speed  switched wireline telecommunications
   capability, including digital subscriber line service. Such devices include,
   but are not limited to, bridge taps, load coils, low pass filters, and range
   extenders.

   (B) Incumbent LECs shall recover the costs of line conditioning from the
   requesting telecommunications carrier in accordance with the Commission's
   forward-looking pricing principles promulgated pursuant to section 252(d)(1)
   of the Act and in compliance with rules governing nonrecurring costs in
   § 51.507(e).

   (C) Insofar as it is technically feasible, the incumbent LEC shall test and
   report  troubles  for all the features, functions, and capabilities of
   conditioned  copper  lines,  and may not restrict its testing to voice
   transmission only.

   (iii) Maintenance, repair, and testing. (A) An incumbent LEC shall provide,
   on  a  nondiscriminatory  basis, physical loop test access points to a
   requesting  telecommunications  carrier  at  the  splitter,  through a
   cross-connection to the requesting telecommunications carrier's collocation
   space,  or  through  a standardized interface, such as an intermediate
   distribution frame or a test access server, for the purpose of testing,
   maintaining, and repairing copper loops and copper subloops.

   (B) An incumbent LEC seeking to utilize an alternative physical access
   methodology may request approval to do so from the state commission, but
   must  show  that  the  proposed  alternative  method is reasonable and
   nondiscriminatory, and will not disadvantage a requesting telecommunications
   carrier's  ability to perform loop or service testing, maintenance, or
   repair.

   (iv) Control of the loop and splitter functionality. In situations where a
   requesting  telecommunications carrier is obtaining access to the high
   frequency portion of a copper loop through a line splitting arrangement, the
   incumbent LEC may maintain control over the loop and splitter equipment and
   functions, and shall provide to the requesting telecommunications carrier
   loop and splitter functionality that is compatible with any transmission
   technology that the requesting telecommunications carrier seeks to deploy
   using  the high frequency portion of the loop, as defined in paragraph
   (a)(1)(i) of this section, provided that such transmission technology is
   presumed to be deployable pursuant to § 51.230.

   (2) Hybrid loops. A hybrid loop is a local loop composed of both fiber optic
   cable, usually in the feeder plant, and copper wire or cable, usually in the
   distribution plant.

   (i) Packet switching facilities, features, functions, and capabilities. An
   incumbent LEC is not required to provide unbundled access to the packet
   switched features, functions and capabilities of its hybrid loops. Packet
   switching capability is the routing or forwarding of packets, frames, cells,
   or other data units based on address or other routing information contained
   in the packets, frames, cells or other data units, and the functions that
   are performed by the digital subscriber line access multiplexers, including
   but not limited to the ability to terminate an end-user customer's copper
   loop (which includes both a low-band voice channel and a high-band data
   channel,  or  solely a data channel); the ability to forward the voice
   channels, if present, to a circuit switch or multiple circuit switches; the
   ability to extract data units from the data channels on the loops; and the
   ability to combine data units from multiple loops onto one or more trunks
   connecting to a packet switch or packet switches.

   (ii) Broadband services. When a requesting telecommunications carrier seeks
   access  to  a  hybrid loop for the provision of broadband services, an
   incumbent LEC shall provide the requesting telecommunications carrier with
   nondiscriminatory  access  to the time division multiplexing features,
   functions,  and capabilities of that hybrid loop, including DS1 or DS3
   capacity (where impairment has been found to exist), on an unbundled basis
   to  establish a complete transmission path between the incumbent LEC's
   central  office and an end user's customer premises. This access shall
   include access to all features, functions, and capabilities of the hybrid
   loop that are not used to transmit packetized information.

   (iii) Narrowband services. When a requesting telecommunications carrier
   seeks access to a hybrid loop for the provision of narrowband services, the
   incumbent LEC may either:

   (A) Provide nondiscriminatory access, on an unbundled basis, to an entire
   hybrid  loop  capable  of voice-grade service (i.e., equivalent to DS0
   capacity), using time division multiplexing technology; or

   (B) Provide nondiscriminatory access to a spare home-run copper loop serving
   that customer on an unbundled basis.

   (3)   Fiber   loops—(i)  Definitions—(A)  Fiber-to-the-home  loops.  A
   fiber-to-the-home loop is a local loop consisting entirely of fiber optic
   cable, whether dark or lit, serving an end user's customer premises or, in
   the case of predominantly residential multiple dwelling units (MDUs), a
   fiber  optic cable, whether dark or lit, that extends to the multiunit
   premises' minimum point of entry (MPOE).

   (B)  Fiber-to-the-curb loops. A fiber-to-the-curb loop is a local loop
   consisting of fiber optic cable connecting to a copper distribution plant
   that is not more than 500 feet from the customer's premises or, in the case
   of predominantly residential MDUs, not more than 500 feet from the MDU's
   MPOE. The fiber optic cable in a fiber-to-the-curb loop must connect to a
   copper distribution plant at a serving area interface from which every other
   copper  distribution  subloop  also is not more than 500 feet from the
   respective customer's premises.

   (ii)  New  builds.  An  incumbent  LEC  is  not  required  to  provide
   nondiscriminatory access to a fiber-to-the-home loop or a fiber-to-the-curb
   loop on an unbundled basis when the incumbent LEC deploys such a loop to an
   end user's customer premises that previously has not been served by any loop
   facility.

   (iii)  Overbuilds.  An  incumbent  LEC  is  not  required  to  provide
   nondiscriminatory access to a fiber-to-the-home loop or a fiber-to-the-curb
   loop on an unbundled basis when the incumbent LEC has deployed such a loop
   parallel to, or in replacement of, an existing copper loop facility, except
   that:

   (A) The incumbent LEC must maintain the existing copper loop connected to
   the particular customer premises after deploying the fiber-to-the-home loop
   or the fiber-to-the-curb loop and provide nondiscriminatory access to that
   copper loop on an unbundled basis unless the incumbent LEC retires the
   copper loops pursuant to paragraph (a)(3)(iv) of this section.

   (B) An incumbent LEC that maintains the existing copper loops pursuant to
   paragraph (a)(3)(iii)(A) of this section need not incur any expenses to
   ensure that the existing copper loop remains capable of transmitting signals
   prior to receiving a request for access pursuant to that paragraph, in which
   case  the  incumbent  LEC shall restore the copper loop to serviceable
   condition upon request.

   (C) An incumbent LEC that retires the copper loop pursuant to paragraph
   (a)(3)(iv) of this section shall provide nondiscriminatory access to a 64
   kilobits per second transmission path capable of voice grade service over
   the fiber-to-the-home loop or fiber-to-the-curb loop on an unbundled basis.

   (iv) Retirement of copper loops or copper subloops. Prior to retiring any
   copper   loop  or  copper  subloop  that  has  been  replaced  with  a
   fiber-to-the-home loop or a fiber-to-the-curb loop, an incumbent LEC must
   comply with:

   (A) The network disclosure requirements set forth in section 251(c)(5) of
   the Act and in § 51.325 through § 51.335; and

   (B) Any applicable state requirements.

   (4) DS1 loops. (i) Subject to the cap described in paragraph (a)(4)(ii) of
   this section, an incumbent LEC shall provide a requesting telecommunications
   carrier with nondiscriminatory access to a DS1 loop on an unbundled basis to
   any building not served by a wire center with at least 60,000 business lines
   and at least four fiber-based collocators. Once a wire center exceeds both
   of these thresholds, no future DS1 loop unbundling will be required in that
   wire center. A DS1 loop is a digital local loop having a total digital
   signal speed of 1.544 megabytes per second. DS1 loops include, but are not
   limited  to,  two-wire and four-wire copper loops capable of providing
   high-bit rate digital subscriber line services, including T1 services.

   (ii) Cap on unbundled DS1 loop circuits. A requesting telecommunications
   carrier  may obtain a maximum of ten unbundled DS1 loops to any single
   building in which DS1 loops are available as unbundled loops.

   (5) DS3 loops. (i) Subject to the cap described in paragraph (a)(5)(ii) of
   this section, an incumbent LEC shall provide a requesting telecommunications
   carrier with nondiscriminatory access to a DS3 loop on an unbundled basis to
   any building not served by a wire center with at least 38,000 business lines
   and at least four fiber-based collocators. Once a wire center exceeds both
   of these thresholds, no future DS3 loop unbundling will be required in that
   wire center. A DS3 loop is a digital local loop having a total digital
   signal speed of 44.736 megabytes per second.

   (ii) Cap on unbundled DS3 loop circuits. A requesting telecommunications
   carrier may obtain a maximum of a single unbundled DS3 loop to any single
   building in which DS3 loops are available as unbundled loops.

   (6) Dark fiber loops. An incumbent LEC is not required to provide requesting
   telecommunications carriers with access to a dark fiber loop on an unbundled
   basis. Dark fiber is fiber within an existing fiber optic cable that has not
   yet  been activated through optronics to render it capable of carrying
   communications services.

   (7) Routine network modifications. (i) An incumbent LEC shall make all
   routine  network  modifications  to  unbundled loop facilities used by
   requesting telecommunications carriers where the requested loop facility has
   already been constructed. An incumbent LEC shall perform these routine
   network modifications to unbundled loop facilities in a nondiscriminatory
   fashion, without regard to whether the loop facility being accessed was
   constructed on behalf, or in accordance with the specifications, of any
   carrier.

   (ii) A routine network modification is an activity that the incumbent LEC
   regularly undertakes for its own customers. Routine network modifications
   include, but are not limited to, rearranging or splicing of cable; adding an
   equipment  case;  adding  a  doubler or repeater; adding a smart jack;
   installing a repeater shelf; adding a line card; deploying a new multiplexer
   or reconfiguring an existing multiplexer; and attaching electronic and other
   equipment  that the incumbent LEC ordinarily attaches to a DS1 loop to
   activate such loop for its own customer. Routine network modifications may
   entail activities such as accessing manholes, deploying bucket trucks to
   reach  aerial cable, and installing equipment casings. Routine network
   modifications  do  not  include the construction of a new loop, or the
   installation   of   new  aerial  or  buried  cable  for  a  requesting
   telecommunications carrier.

   (8) Engineering policies, practices, and procedures. An incumbent LEC shall
   not engineer the transmission capabilities of its network in a manner, or
   engage in any policy, practice, or procedure, that disrupts or degrades
   access  to  a  local  loop  or  subloop,  including  the time division
   multiplexing-based features, functions, and capabilities of a hybrid loop,
   for which a requesting telecommunications carrier may obtain or has obtained
   access pursuant to paragraph (a) of this section.

   (b) Subloops. An incumbent LEC shall provide a requesting telecommunications
   carrier with nondiscriminatory access to subloops on an unbundled basis in
   accordance with section 251(c)(3) of the Act and this part and as set forth
   in paragraph (b) of this section.

   (1)  Copper  subloops.  An  incumbent  LEC  shall provide a requesting
   telecommunications carrier with nondiscriminatory access to a copper subloop
   on an unbundled basis. A copper subloop is a portion of a copper loop, or
   hybrid loop, comprised entirely of copper wire or copper cable that acts as
   a transmission facility between any point of technically feasible access in
   an incumbent LEC's outside plant, including inside wire owned or controlled
   by the incumbent LEC, and the end-user customer premises. A copper subloop
   includes all intermediate devices (including repeaters and load coils) used
   to establish a transmission path between a point of technically feasible
   access and the demarcation point at the end-user customer premises, and
   includes the features, functions, and capabilities of the copper loop.
   Copper subloops include two-wire and four-wire analog voice-grade subloops
   as well as two-wire and four-wire subloops conditioned to transmit the
   digital  signals  needed  to provide digital subscriber line services,
   regardless of whether the subloops are in service or held as spares.

   (i) Point of technically feasible access. A point of technically feasible
   access is any point in the incumbent LEC's outside plant where a technician
   can access the copper wire within a cable without removing a splice case.
   Such points include, but are not limited to, a pole or pedestal, the serving
   area interface, the network interface device, the minimum point of entry,
   any remote terminal, and the feeder/distribution interface. An incumbent LEC
   shall, upon a site-specific request, provide access to a copper subloop at a
   splice near a remote terminal. The incumbent LEC shall be compensated for
   providing this access in accordance with § § 51.501 through 51.515.

   (ii) Rules for collocation. Access to the copper subloop is subject to the
   Commission's collocation rules at § § 51.321 and 51.323.

   (2) Subloops for access to multiunit premises wiring. An incumbent LEC shall
   provide a requesting telecommunications carrier with nondiscriminatory
   access  to  the  subloop for access to multiunit premises wiring on an
   unbundled basis regardless of the capacity level or type of loop that the
   requesting telecommunications carrier seeks to provision for its customer.
   The  subloop for access to multiunit premises wiring is defined as any
   portion of the loop that it is technically feasible to access at a terminal
   in the incumbent LEC's outside plant at or near a multiunit premises. One
   category of this subloop is inside wire, which is defined for purposes of
   this section as all loop plant owned or controlled by the incumbent LEC at a
   multiunit customer premises between the minimum point of entry as defined in
   § 68.105 of this chapter and the point of demarcation of the incumbent LEC's
   network as defined in § 68.3 of this chapter.

   (i) Point of technically feasible access. A point of technically feasible
   access  is any point in the incumbent LEC's outside plant at or near a
   multiunit premises where a technician can access the wire or fiber within
   the cable without removing a splice case to reach the wire or fiber within
   to access the wiring in the multiunit premises. Such points include, but are
   not  limited to, a pole or pedestal, the network interface device, the
   minimum  point  of entry, the single point of interconnection, and the
   feeder/distribution interface.

   (ii) Single point of interconnection. Upon notification by a requesting
   telecommunications carrier that it requests interconnection at a multiunit
   premises where the incumbent LEC owns, controls, or leases wiring, the
   incumbent  LEC shall provide a single point of interconnection that is
   suitable for use by multiple carriers. This obligation is in addition to the
   incumbent LEC's obligations, under paragraph (b)(2) of this section, to
   provide  nondiscriminatory access to a subloop for access to multiunit
   premises wiring, including any inside wire, at any technically feasible
   point. If the parties are unable to negotiate rates, terms, and conditions
   under  which  the  incumbent  LEC  will  provide  this single point of
   interconnection, then any issues in dispute regarding this obligation shall
   be resolved in state proceedings under section 252 of the Act.

   (3) Other subloop provisions—(i) Technical feasibility. If parties are
   unable to reach agreement through voluntary negotiations as to whether it is
   technically feasible, or whether sufficient space is available, to unbundle
   a copper subloop or subloop for access to multiunit premises wiring at the
   point where a telecommunications carrier requests, the incumbent LEC shall
   have  the  burden  of  demonstrating to the state commission, in state
   proceedings under section 252 of the Act, that there is not sufficient space
   available, or that it is not technically feasible to unbundle the subloop at
   the point requested.

   (ii) Best practices. Once one state commission has determined that it is
   technically  feasible  to  unbundle subloops at a designated point, an
   incumbent LEC in any state shall have the burden of demonstrating to the
   state commission, in state proceedings under section 252 of the Act, that it
   is not technically feasible, or that sufficient space is not available, to
   unbundle its own loops at such a point.

   (c) Network interface device. Apart from its obligation to provide the
   network interface device functionality as part of an unbundled loop or
   subloop, an incumbent LEC also shall provide nondiscriminatory access to the
   network interface device on an unbundled basis, in accordance with section
   251(c)(3) of the Act and this part. The network interface device element is
   a stand-alone network element and is defined as any means of interconnection
   of customer premises wiring to the incumbent LEC's distribution plant, such
   as a cross-connect device used for that purpose. An incumbent LEC shall
   permit a requesting telecommunications carrier to connect its own loop
   facilities  to  on-premises wiring through the incumbent LEC's network
   interface device, or at any other technically feasible point.

   (d)  Dedicated  transport. An incumbent LEC shall provide a requesting
   telecommunications  carrier with nondiscriminatory access to dedicated
   transport on an unbundled basis, in accordance with section 251(c)(3) of the
   Act and this part, as set forth in paragraphs (d) through (d)(4) of this
   section. A “route” is a transmission path between one of an incumbent LEC's
   wire centers or switches and another of the incumbent LEC's wire centers or
   switches. A route between two points (e.g., wire center or switch “A” and
   wire center or switch “Z”) may pass through one or more intermediate wire
   centers or switches (e.g., wire center or switch “X”). Transmission paths
   between identical end points (e.g., wire center or switch “A” and wire
   center or switch “Z”) are the same “route,” irrespective of whether they
   pass through the same intermediate wire centers or switches, if any.

   (1) Definition. For purposes of this section, dedicated transport includes
   incumbent LEC transmission facilities between wire centers or switches owned
   by incumbent LECs, or between wire centers or switches owned by incumbent
   LECs  and  switches  owned  by requesting telecommunications carriers,
   including, but not limited to, DS1-, DS3-, and OCn-capacity level services,
   as well as dark fiber, dedicated to a particular customer or carrier.

   (2) Availability.

   (i) Entrance facilities. An incumbent LEC is not obligated to provide a
   requesting carrier with unbundled access to dedicated transport that does
   not connect a pair of incumbent LEC wire centers.

   (ii)  Dedicated  DS1  transport. Dedicated DS1 transport shall be made
   available to requesting carriers on an unbundled basis as set forth in
   paragraphs (d)(2)(ii)(A) and (B) of this section. Dedicated DS1 transport
   consists of incumbent LEC interoffice transmission facilities that have a
   total digital signal speed of 1.544 megabytes per second and are dedicated
   to a particular customer or carrier.

   (A) General availability of DS1 transport. Incumbent LECs shall unbundle DS1
   transport between any pair of incumbent LEC wire centers except where,
   through application of tier classifications described in paragraph (d)(3) of
   this section, both wire centers defining the route are Tier 1 wire centers.
   As such, an incumbent LEC must unbundle DS1 transport if a wire center at
   either end of a requested route is not a Tier 1 wire center, or if neither
   is a Tier 1 wire center.

   (B) Cap on unbundled DS1 transport circuits. A requesting telecommunications
   carrier  may obtain a maximum of ten unbundled DS1 dedicated transport
   circuits on each route where DS1 dedicated transport is available on an
   unbundled basis.

   (iii)  Dedicated  DS3 transport. Dedicated DS3 transport shall be made
   available to requesting carriers on an unbundled basis as set forth in
   paragraphs (d)(2)(iii)(A) and(B) of this section. Dedicated DS3 transport
   consists of incumbent LEC interoffice transmission facilities that have a
   total digital signal speed of 44.736 megabytes per second and are dedicated
   to a particular customer or carrier.

   (A) General availability of DS3 transport. Incumbent LECs shall unbundle DS3
   transport between any pair of incumbent LEC wire centers except where,
   through application of tier classifications described in paragraph (d)(3) of
   this section, both wire centers defining the route are either Tier 1 or Tier
   2 wire centers. As such, an incumbent LEC must unbundle DS3 transport if a
   wire center on either end of a requested route is a Tier 3 wire center.

   (B) Cap on unbundled DS3 transport circuits. A requesting telecommunications
   carrier  may  obtain a maximum of 12 unbundled DS3 dedicated transport
   circuits on each route where DS3 dedicated transport is available on an
   unbundled basis.

   (iv) Dark fiber transport. Dark fiber transport consists of unactivated
   optical interoffice transmission facilities. Incumbent LECs shall unbundle
   dark fiber transport between any pair of incumbent LEC wire centers except
   where, through application of tier classifications described in paragraph
   (d)(3) of this section, both wire centers defining the route are either Tier
   1  or  Tier  2 wire centers. An incumbent LEC must unbundle dark fiber
   transport if a wire center on either end of a requested route is a Tier 3
   wire center.

   (3) Wire center tier structure. For purposes of this section, incumbent LEC
   wire centers shall be classified into three tiers, defined as follows:

   (i) Tier 1 wire centers are those incumbent LEC wire centers that contain at
   least four fiber-based collocators, at least 38,000 business lines, or both.
   Tier 1 wire centers also are those incumbent LEC tandem switching locations
   that have no line-side switching facilities, but nevertheless serve as a
   point of traffic aggregation accessible by competitive LECs. Once a wire
   center is determined to be a Tier 1 wire center, that wire center is not
   subject to later reclassification as a Tier 2 or Tier 3 wire center.

   (ii) Tier 2 wire centers are those incumbent LEC wire centers that are not
   Tier 1 wire centers, but contain at least 3 fiber-based collocators, at
   least 24,000 business lines, or both. Once a wire center is determined to be
   a  Tier  2  wire  center,  that  wire  center  is not subject to later
   reclassification as a Tier 3 wire center.

   (iii) Tier 3 wire centers are those incumbent LEC wire centers that do not
   meet the criteria for Tier 1 or Tier 2 wire centers.

   (4) Routine network modifications. (i) An incumbent LEC shall make all
   routine network modifications to unbundled dedicated transport facilities
   used by requesting telecommunications carriers where the requested dedicated
   transport facilities have already been constructed. An incumbent LEC shall
   perform all routine network modifications to unbundled dedicated transport
   facilities in a nondiscriminatory fashion, without regard to whether the
   facility being accessed was constructed on behalf, or in accordance with the
   specifications, of any carrier.

   (ii) A routine network modification is an activity that the incumbent LEC
   regularly undertakes for its own customers. Routine network modifications
   include, but are not limited to, rearranging or splicing of cable; adding an
   equipment case; adding a doubler or repeater; installing a repeater shelf;
   and deploying a new multiplexer or reconfiguring an existing multiplexer.
   They   also   include   activities   needed  to  enable  a  requesting
   telecommunications carrier to light a dark fiber transport facility. Routine
   network modifications may entail activities such as accessing manholes,
   deploying bucket trucks to reach aerial cable, and installing equipment
   casings. Routine network modifications do not include the installation of
   new aerial or buried cable for a requesting telecommunications carrier.

   (e) 911 and E911 databases. An incumbent LEC shall provide a requesting
   telecommunications carrier with nondiscriminatory access to 911 and E911
   databases on an unbundled basis, in accordance with section 251(c)(3) of the
   Act and this part.

   (f) Operations support systems. An incumbent LEC shall provide a requesting
   telecommunications carrier with nondiscriminatory access to operations
   support systems on an unbundled basis, in accordance with section 251(c)(3)
   of the Act and this part. Operations support system functions consist of
   pre-ordering, ordering, provisioning, maintenance and repair, and billing
   functions supported by an incumbent LEC's databases and information. An
   incumbent LEC, as part of its duty to provide access to the pre-ordering
   function, shall provide the requesting telecommunications carrier with
   nondiscriminatory access to the same detailed information about the loop
   that is available to the incumbent LEC.

   [ 68 FR 52295 , Sept. 4, 2003, as amended at  68 FR 64000 , Nov. 12, 2003;  69 FR 54591 , Sept. 9, 2004;  69 FR 77953 , Dec. 29, 2004;  70 FR 8953 , Feb. 24,
   :78 2005 FR 5746 , Jan. 28, 2013]

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