CoreTel Virginia, LLC v. Verizon Virginia, LLC , 808 F.3d 978 ( 2015 )


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  •                                 PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 15-1008
    CORETEL VIRGINIA, LLC,
    Plaintiff – Appellant,
    v.
    VERIZON VIRGINIA, LLC; VERIZON SOUTH, INC.; MCIMETRO ACCESS
    TRANSMISSION SERVICES, LLC; MCI COMMUNICATIONS SERVICES,
    INC.;   VERIZON   BUSINESS   GLOBAL   LLC;   BELL  ATLANTIC
    COMMUNICATIONS, INC., d/b/a Verizon Long Distance,
    Defendants – Appellees.
    Appeal from the United States District Court for the Eastern
    District of Virginia, at Alexandria.    Claude M. Hilton, Senior
    District Judge. (1:12-cv-00741-CMH-TCB)
    Argued:   September 16, 2015                Decided:   November 13, 2015
    Before WILKINSON, NIEMEYER, and DUNCAN, Circuit Judges.
    Affirmed by published opinion. Judge Duncan wrote the opinion,
    in which Judge Wilkinson and Judge Niemeyer joined.
    ARGUED: Edward Jay Tolchin, OFFIT KURMAN, P.A., Tysons Corner,
    Virginia, for Appellant.   Scott H. Angstreich, KELLOGG, HUBER,
    HANSEN, TODD, EVANS & FIGEL, P.L.L.C., Washington, D.C., for
    Appellees. ON BRIEF: Eduardo F. Bruera, KELLOGG, HUBER, HANSEN,
    TODD, EVANS & FIGEL, P.L.L.C., Washington, D.C., for Appellees.
    DUNCAN, Circuit Judge:
    CoreTel       Virginia,      LLC        (“CoreTel”),          a    telecommunications
    company,     has     entered          into    interconnection             agreements        with
    Verizon    Virginia,       LLC    and        Verizon        South,      Inc.   (collectively
    “Verizon”)    in     accordance         with          the   Telecommunications            Act    of
    1996, Pub. L. No. 104-104, 110 Stat. 56 (codified at 47 U.S.C.
    § 151   et   seq.).         In    this        second        appeal      arising    out     of     a
    disagreement between CoreTel and Verizon over their respective
    obligations    under        those       interconnection              agreements,      CoreTel
    disputes the district court’s determination that it owes Verizon
    $227,974.22        for     the        use     of       Verizon’s        telecommunications
    facilities    and        $138,724.47         in       late-payment       fees.       For        the
    reasons that follow, we affirm.
    I.
    The Telecommunications Act of 1996 (the “Act”) provides the
    context for this dispute between CoreTel and Verizon.                                      As we
    explained    more    fully       in    our    first         opinion,     the   Act   requires
    incumbent    local       exchange       carriers            such   as    Verizon     to    allow
    competitive local exchange carriers such as CoreTel to connect
    with end users over the incumbent’s network.                              See CoreTel Va.,
    LLC v. Verizon Va., LLC, 
    752 F.3d 364
    , 366–68 (4th Cir. 2014)
    (“CoreTel I”).           Using the procedures set out in section 252 of
    the Act, 47 U.S.C. § 252, carriers negotiate private agreements
    2
    with each other that establish the rates and terms under which
    their networks will be interconnected.                   This case involves two
    such interconnection agreements: one between CoreTel and Verizon
    Virginia,      and    one     between   CoreTel        and   Verizon     South    (the
    “ICAs”). 1
    The ICAs govern, among other aspects of interconnection,
    CoreTel’s       use      of     Verizon’s        physical       telecommunications
    facilities.      In CoreTel I, we addressed the parties’ dispute
    over what rates CoreTel must pay to use Verizon’s facilities.
    
    See 752 F.3d at 370
    –72.            Verizon took the position that it was
    entitled to charge the rates set out in its tariffs filed with
    state    and    federal       regulatory       agencies,     and     billed     CoreTel
    accordingly.          CoreTel   believed       that    the   ICAs   entitled     it   to
    purchase access to Verizon facilities at a lower “total element
    long-run incremental cost,” or “TELRIC” rate. 2                     CoreTel declined
    to pay not only the amounts set out in Verizon’s tariff-based
    bills,   but    also     the    TELRIC-based          amounts   CoreTel       contended
    should have been billed.
    1 We cite “the ICAs” throughout rather than distinguishing
    between the Verizon Virginia ICA and the Verizon South ICA. The
    two agreements are identical in all relevant respects except for
    pricing, which is dealt in separate “pricing attachments.”
    2 TELRIC is a cost-based pricing methodology established by
    the Federal Communications Commission to encourage competition
    among carriers.    See, e.g., Verizon Commc’ns, Inc. v. Fed.
    Commc’ns Comm’n, 
    535 U.S. 467
    , 495–96 (2002).
    3
    Verizon sued for breach of contract, bringing two claims
    associated with CoreTel’s refusal to pay its tariff-based bills.
    First, Verizon sought a declaratory judgment that, if CoreTel
    failed    to    pay,   Verizon     was     entitled      to    terminate      CoreTel’s
    service.         Second,    Verizon       sought       damages    associated        with
    CoreTel’s breach of the ICAs.
    In    CoreTel     I,   we    held    that    Verizon      should    have     billed
    CoreTel for facilities at TELRIC rather than tariff rates, and
    that therefore “CoreTel was entitled to summary judgment in its
    favor on . . . Verizon’s claim for declaratory relief relating
    to Verizon’s facilities 
    charges.” 752 F.3d at 372
    .        We did not,
    however,    resolve     Verizon’s        claim   for    damages    associated        with
    CoreTel’s breach of the ICAs.              Rather, we remanded that claim so
    that the district court could apply the proper TELRIC rates to
    calculate       what   CoreTel     owes     Verizon      for     use    of    Verizon’s
    facilities.      
    Id. On remand,
    the district court held a bench trial, during
    which Verizon presented the tariff-based monthly bills it had
    issued to CoreTel and the “pricing attachments” to the ICAs.
    The monthly bills detail (1) what facilities Verizon provided to
    CoreTel;       (2)   whether     the   facility        was    provided       by   Verizon
    Virginia or Verizon South and, if split between those two, the
    percentage of the facility in each company’s service area; and
    (3) for transport facilities billed by the mile, the number of
    4
    transport miles provided.            The ICAs’ pricing attachments set out
    the TELRIC rates associated with each type of facility.                       Pricing
    is the only term on which the Verizon Virginia ICA and the
    Verizon South ICA differ; the ICAs are otherwise identical in
    all relevant respects.
    From that evidence, Verizon developed a summary spreadsheet
    containing an entry for every facility it provided to CoreTel
    with    the   specific      amount     owed    for   each      at    TELRIC     rates.
    J.A. 865–99.         The    entries,     in     total,    reflected        debts   of
    $162,871.70 for Verizon Virginia facilities and $65,102.52 for
    Verizon South facilities, for a total of $227,974.22 in damages.
    Verizon also contended that it was entitled to late-payment
    fees of 1.5% per month on the facilities charges under the ICAs.
    To    calculate    the     amount,    Verizon    presented          another    summary
    spreadsheet       detailing    the     total     unpaid       facilities      charges
    accrued (i.e., the principal) for each month and the total late
    fees associated with those unpaid facilities charges.                      J.A. 900–
    01.    The late fees totaled $131,885.25.
    CoreTel    raised    numerous    objections       to   Verizon’s       proposed
    damages calculation, each of which the district court rejected
    in entering judgment in favor of Verizon for the full amount it
    5
    sought--$227,974.22     in   facilities   charges    and    $138,724.47      in
    late fees. 3   J.A. 451.     This appeal followed.
    II.
    Under Virginia law, 4 “[t]he elements of a breach of contract
    action are (1) a legally enforceable obligation of a defendant
    to a plaintiff; (2) the defendant’s violation or breach of that
    obligation; and (3) injury or damage to the plaintiff caused by
    the   breach   of   obligation.”    Ramos   v.   Wells     Fargo    Bank,   NA,
    
    770 S.E.2d 491
    , 493 (Va. 2015) (citation omitted).                 CoreTel has
    never disputed that the ICAs are valid contracts that require it
    to pay for its use of Verizon’s facilities, that it has in fact
    used Verizon facilities without paying for that use, or that its
    failure to pay has injured Verizon.
    The sole question in this appeal is whether the district
    court properly calculated Verizon’s damages for CoreTel’s breach
    as we instructed.       CoreTel argues (1) that the district court
    violated our mandate in CoreTel I by awarding as damages any
    TELRIC-based facilities charges at all; (2) that even if Verizon
    3The $6,839.22 difference between the late fees Verizon
    calculated at the time of trial ($131,885.25) and the late fees
    the district court awarded represents additional late-fee
    accumulation during the two months that passed between the bench
    trial and the judgment.
    4The ICAs are governed by Virginia law except to the extent
    federal law controls. ICAs § 28.5, J.A. 543.
    6
    can recover such facilities charges, the district court made
    several   errors   in      calculating      the   total     amount   owed;   and
    (3) that the district court further erred in calculating the
    late fees CoreTel owes under the ICAs.              In addressing CoreTel’s
    arguments, we review the district court’s factual findings for
    clear error and its conclusions of law de novo.                 See Helton v.
    AT&T Inc., 
    709 F.3d 343
    , 350 (4th Cir. 2013).
    A.
    As we clarify during our discussion, several of CoreTel’s
    arguments suffer from the same underlying flaw: a misperception
    of the mandate rule.         The mandate rule “is merely a specific
    application of the law of the case doctrine.”                United States v.
    Pileggi, 
    703 F.3d 675
    , 679 (4th Cir. 2013) (citation omitted).
    It   “prohibits    lower     courts,     with     limited    exceptions,     from
    considering questions that the mandate of a higher court has
    laid to rest.”     Moore v. Bennette, 
    517 F.3d 717
    , 727 (4th Cir.
    2008) (citation omitted).
    CoreTel appears to believe that our opinion in CoreTel I
    froze not only the law of the case but also all the underlying
    facts.    Our remand order in CoreTel I, however, contemplated
    that the district court would conduct additional fact-finding to
    determine what CoreTel owes Verizon for facilities at TELRIC
    rates.    The only matter our mandate in CoreTel I “laid to rest”
    with regard to Verizon’s facilities claims is that TELRIC rates
    7
    should apply, not tariff rates.                 The district court faithfully
    followed that ruling.
    B.
    We first address CoreTel’s argument, under the guise of the
    mandate rule, that our opinion in CoreTel I precludes Verizon
    from   recovering     as   damages     any       facilities    charges     at   all.
    Essentially, CoreTel interprets that opinion to have mandated
    complete    summary    judgment      in        CoreTel’s    favor   on    Verizon’s
    facilities-related claims, leaving Verizon without a live claim
    on which to seek damages.            Thus, CoreTel argues, the district
    court violated our mandate when it nonetheless awarded damages.
    CoreTel misunderstands both CoreTel I and Verizon’s claims.
    As we explain above, Verizon brought two claims related to its
    provision of facilities to CoreTel: a declaratory-judgment claim
    and a claim for damages associated with a breach of the ICAs.
    In CoreTel I, we held that “CoreTel was entitled to summary
    judgment in its favor on . . . Verizon’s claim for declaratory
    relief    relating    to   Verizon’s      facilities       charges,”     because   we
    agreed with CoreTel that Verizon was limited to charging the
    TELRIC rates for its 
    facilities. 752 F.3d at 372
    (emphasis
    added).     But we expressly did not resolve Verizon’s claim for
    damages associated with CoreTel’s breach of the ICAs.                       Rather,
    we “remand[ed] to the district court for consideration of . . .
    8
    Verizon’s damages claim.”            
    Id. 5 Thus,
    the district court did not
    violate our mandate when it considered Verizon’s damages claim. 6
    C.
    We    turn   next   to     CoreTel’s      challenges   to   the    district
    court’s       calculation     of    the      outstanding   facilities       charges
    CoreTel owes Verizon.             To understand CoreTel’s arguments, some
    background information about the ICAs is helpful.                         Under the
    ICAs,       the   parties   are    to   establish     “interconnection      points”
    (“IPs”) at particular, agreed-upon locations.                  See ICA § 4.2.2,
    J.A. 469.         When a CoreTel customer calls a Verizon customer,
    CoreTel is responsible for delivering that call to the relevant
    Verizon IP, either by using its own facilities or by purchasing
    access to Verizon’s facilities at the TELRIC rates set out in
    5
    CoreTel interprets this quotation to be instructing the
    district court simply to undertake “the task of adding up the
    damages Verizon was awarded, outside of its facilities claims.”
    Appellant’s Br. at 30 (emphasis added). But the quotation comes
    from a portion of CoreTel I that discusses solely Verizon’s
    facilities claims, and the context makes clear that the “damages
    claim”   in  question   is  Verizon’s  breach-of-contract  claim
    associated with CoreTel’s failure to pay for facilities.     See
    CoreTel 
    I, 752 F.3d at 370
    –72.
    6
    CoreTel further argues that the district court violated
    our mandate by allowing Verizon to recover TELRIC-based damages
    after it had contended, prior to CoreTel I, that its facilities
    should be billed at tariff rates.    This argument is similarly
    unpersuasive. Far from a violation of the mandate, calculating
    and awarding TELRIC-based damages to Verizon was the express
    purpose for which we remanded this case to the district court
    after CoreTel I. See 
    id. 9 the
    ICAs.        See 
    id. (“Each Party
    is responsible for delivering
    its terminating traffic to the other Party’s relevant IP.”).
    Once     CoreTel    delivers      the     call    to    the   IP,    Verizon   is
    responsible for delivering it the rest of the way to the call
    recipient.        CoreTel pays Verizon for doing so through a per-
    minute      “reciprocal         compensation”      charge.           See   CoreTel    
    I, 752 F.3d at 369
    , 373.            In fact, the ICAs define “interconnection
    point” to mean “the point at which a Party who receives traffic
    originating       on   the       network    of     the    other       Party   assesses
    Reciprocal Compensation charges for the further transport and
    termination of that traffic.”              ICA § 1.37, J.A. 461.
    The ICAs label the point at which CoreTel traffic passes
    from CoreTel-owned facilities onto Verizon-owned facilities as
    the “point of interconnection” (“POI”). 7                 When CoreTel is able to
    use its own facilities to deliver traffic all the way to the
    relevant Verizon IP, the POI and the IP are necessarily at the
    same   location.          But    when   CoreTel    uses       Verizon   facilities    to
    which it has purchased access to deliver traffic to the Verizon
    IP, the POI and the IP are distinct.
    For such situations, the ICAs re-affirm the rule that the
    mode       of   compensation        does    not     switch       from      TELRIC-based
    7
    Specifically, the ICAs define “POI” to mean “the physical
    location where the originating Party’s facilities physically
    interconnect with the terminating Party’s facilities for the
    purpose of exchanging traffic.” ICA § 1.54, J.A. 463.
    10
    facilities charges to reciprocal compensation until the traffic
    passes the IP.          See ICA § 4.2.3, J.A. 469 (“To the extent the
    originating       Party’s     [POI]   is    not     located       at   the    terminating
    Party’s relevant IP, the originating Party is responsible for
    transporting its traffic from its POI to the terminating Party’s
    relevant IP.”).           In other words, CoreTel must pay TELRIC-based
    facilities        charges    for    any    Verizon        facilities         it    uses    to
    transport traffic between the POI and the relevant Verizon IP.
    With    that   background      in    mind,    we    now     turn      to   CoreTel’s
    specific objections to the district court’s damages calculation.
    CoreTel contends that the district court erred by (1) including
    in   its   damages      calculation       any    facilities       charges         associated
    with   Verizon      South    at    all;    (2)    using     the    National        Exchange
    Carrier Association’s FCC Tariff No. 4 (“NECA Tariff No. 4”) to
    allocate      charges     for     facilities      jointly       provided      by    Verizon
    Virginia and Verizon South; (3) using Verizon South’s TELRIC
    rate to calculate damages for a multiplexer previously billed at
    Verizon Virginia’s (lower) TELRIC rate; (4) including in its
    damages       calculation       charges    for    transport        between        Verizon’s
    “serving wire centers” and its IPs; (5) imposing 100% of the
    TELRIC     rate     for     certain   facilities          for     which      Verizon      had
    previously billed CoreTel only a percentage of its tariff rates;
    and (6) failing to apply the two-year statute of limitations set
    out in 47 U.S.C. § 415(a).                 We address CoreTel’s arguments in
    11
    turn below, ultimately rejecting each and affirming the district
    court’s     calculation       of   the    TELRIC-based      facilities      charges
    CoreTel owes Verizon.
    1.
    CoreTel first argues that it should not owe any facilities
    charges at all to Verizon South because CoreTel traffic always
    entered    the    Verizon     network     via    Verizon   Virginia   facilities,
    even when the traffic terminated with Verizon South.                     According
    to CoreTel, it should have to pay only Verizon Virginia, through
    whose facilities CoreTel’s traffic enters the Verizon network.
    If CoreTel’s traffic thereafter uses Verizon South facilities,
    CoreTel contends that Verizon Virginia, not CoreTel, should have
    to compensate Verizon South for that use.
    The ICAs, however, make clear that CoreTel must pay Verizon
    Virginia    for    use   of   Verizon     Virginia      facilities    and   Verizon
    South for use of Verizon South facilities, regardless of where
    CoreTel traffic enters the Verizon network.                 Under section 4.2.2
    of the ICAs, “[e]ach Party is responsible for delivering its
    terminating       traffic     to    the     other       Party’s   relevant    IP.”
    J.A. 469.        Moreover, the Verizon Virginia ICA expressly covers
    “services in Verizon Virginia’s service territory . . . only,”
    J.A.   612,   and    the    Verizon      South    ICA   expressly    covers   “only
    services in Verizon South’s service territory,” J.A. 619.                     Thus,
    12
    the district court properly included Verizon South facilities
    charges where CoreTel used Verizon South facilities.
    2.
    CoreTel       also   contends    that     the    district       court    erred      by
    using NECA Tariff No. 4 to determine how to calculate charges
    for facilities located partially in Verizon Virginia territory
    and partially in Verizon South territory.                       NECA Tariff No. 4 is
    an   industry          standard   methodology           used     to     establish,          for
    telecommunications           facilities        located     in    multiple       companies’
    territories, what percentage of a particular facility should be
    billed by each company.                 It does not establish actual tariff
    rates to be charged by those companies.
    CoreTel does not contest that, as a general matter, NECA
    Tariff    No.     4    provides   a     proper    methodology         for   apportioning
    charges for jointly provided facilities.                         Instead, it argues
    that the district court’s reliance on NECA Tariff No. 4 was
    improper because “this Court has ruled that the ICA’s rates,
    terms     and     conditions--not        any     Verizon       tariff--apply          to   the
    facilities      Verizon      provided.”         Appellant’s       Br.    at     44.        NECA
    Tariff No. 4, however, is not a Verizon tariff; it is a tariff
    filed by the National Exchange Carrier Association.                             Thus, the
    district court’s use of NECA Tariff No. 4 did not contravene our
    ruling in CoreTel I that Verizon’s tariffs do not apply here.
    13
    Moreover, the ICAs provide no guidance as to how billing
    should be apportioned for facilities jointly provided by Verizon
    Virginia and Verizon South.           When the parties to a contract
    “have not agreed with respect to a term which is essential to a
    determination of their rights and duties,” the court supplies “a
    term which is reasonable in the circumstances.”                   Restatement
    (Second) of Contracts § 204 (1981).            Here, the district court’s
    decision    to    rely   on   an   industry    standard      methodology   was
    eminently reasonable. 8
    3.
    We    next    address    CoreTel’s   contention    that    the    district
    court erred by using Verizon South’s TELRIC rate (rather than
    Verizon Virginia’s) to calculate what CoreTel owes Verizon for
    CoreTel’s    use    of   a    multiplexer     located   in     Great    Bridge,
    Virginia.    Great Bridge is in Verizon South’s territory.                 But
    between January 2008 and March 2009, Verizon’s monthly bills
    8 CoreTel’s other complaints concerning NECA Tariff No. 4
    are equally unavailing. CoreTel asserts that NECA Tariff No. 4
    is “inconsistent with the TELRIC methodology,” Appellant’s Br.
    at 44, but offers neither an explanation of this purported
    inconsistency nor any alternative method for apportioning
    facilities charges for jointly provided facilities.       CoreTel
    also incorrectly claims that Verizon did not introduce NECA
    Tariff No. 4 at trial. Although it is true that Verizon did not
    introduce the entire nationwide tariff (most of which would have
    been irrelevant), Verizon did introduce into evidence the
    specific billing percentages from NECA Tariff No. 4 it relied
    on.   Those percentages appeared on Verizon’s monthly bills to
    CoreTel, and CoreTel did not contest their accuracy at trial.
    14
    identified         that    multiplexer       as      being     provided       by     Verizon
    Virginia.      At trial, Verizon introduced evidence that this was a
    mistake      and    that    the     multiplexer         should     always       have       been
    associated      with      Verizon    South.         Accordingly,        in    its     damages
    request,     Verizon       billed    the     Great     Bridge     multiplexer         at    the
    Verizon South TELRIC rate (which is substantially higher than
    the Verizon Virginia rate), except for the months for which its
    bills had affirmatively associated the multiplexer with Verizon
    Virginia.      For those months, Verizon gave CoreTel the benefit of
    the     purported      billing      error     and      charged    the     lower       Verizon
    Virginia rate.
    As    CoreTel’s       president       conceded      at     trial,      there     is    no
    dispute that the Great Bridge multiplexer is located in Verizon
    South      territory.        See     J.A.     405–06.          Nevertheless,          CoreTel
    contends that Verizon did not catch this mistake in previous
    estimates of the damages CoreTel owes it, and should not be
    permitted     to     “change     the   facts      at    its    whim,     after       remand.”
    Appellant’s Br. at 46.
    CoreTel’s argument is without merit.                       Verizon was entitled
    to    present       its    evidence     at     trial      that     the       Great     Bridge
    multiplexer should always have been billed at Verizon South’s
    rate, just as CoreTel was entitled to counter with Verizon’s
    monthly bills and prior damages calculations that showed the
    Great Bridge multiplexer being associated with Verizon Virginia
    15
    at times.     The district court considered both parties’ evidence,
    and it did not clearly err in finding that Verizon’s was more
    persuasive, particularly given CoreTel’s president’s concession
    that the Great Bridge multiplexer is in Verizon South territory.
    4.
    We turn next to CoreTel’s argument that the district court
    erred   by    including    in     its   damages      calculation       charges        for
    transport     between     Verizon’s     “serving         wire    centers”       and   the
    relevant Verizon IP.            This is essentially a dispute about the
    definition of the term “entrance facility.”                        The ICAs define
    “entrance     facility”    to    mean   “the      facility       between    a    Party’s
    designated     premises     and     the        Central     Office     serving         that
    designated premises.”           ICA § 1.25, J.A. 460.              CoreTel contends
    that when it purchases use of an entrance facility, transport to
    the relevant Verizon IP is included in that purchase.                           Verizon,
    on the other hand, contends that an entrance facility ends at
    the Verizon switch nearest to CoreTel’s premises--Verizon calls
    this the “serving wire center”--and that CoreTel therefore must
    purchase additional transport to get its traffic to the relevant
    Verizon IP.
    Verizon’s     interpretation          adheres        more    closely       to     the
    language of the ICAs.           The ICAs’ definition establishes that an
    entrance     facility   begins     at   “[CoreTel]’s        designated      premises”
    and ends at Verizon’s “Central Office serving that designated
    16
    premises.”      
    Id. The ICAs
    define “Central Office” as “a local
    switching system for connecting lines to lines, lines to trunks,
    or trunks to trunks for the purpose of originating/terminating
    calls over the public switched telephone network.”                      ICA § 1.11,
    J.A.   458.      Thus,    the   entrance      facility    ends    at    the    Verizon
    switch nearest the point of interconnection, and CoreTel must
    pay for any additional transport needed to reach the relevant
    Verizon IP, which, as we have explained, may be located at a
    different point.         The district court did not err by including
    charges for such transport in its damages calculation.
    5.
    We next address CoreTel’s argument that the district court
    erred by imposing 100% of the TELRIC rate for certain facilities
    for    which    Verizon      had     previously      billed      CoreTel       only    a
    percentage of its tariff rates.               CoreTel contends that Verizon’s
    bills show it only partially used the facilities in question and
    should therefore be billed only a partial TELRIC rate.                                The
    district court, however, found that the facilities in question
    had    been    completely    dedicated        to   CoreTel’s     use,    and    as     we
    explain below, that finding was not clearly erroneous.
    Under Verizon’s tariffs, different rates applied to certain
    facilities,      depending      on   what     type   of   access       the    customer
    17
    required--switched          access    or   special      access. 9    When    CoreTel
    customers used a single Verizon facility for both special and
    switched access, Verizon charged the two rates proportionally on
    its tariff-based monthly bills.                  See, e.g., J.A. 694 (billing
    57.14% of the tariff rate for switched access and 42.86% of the
    tariff rate for special access).                 The TELRIC rates, however, do
    not differentiate between special and switched access.                         Thus,
    when Verizon re-calculated its bills applying TELRIC rates, it
    simply charged 100% of the TELRIC rate for facilities that had
    previously been split between special and switched access.
    In several instances, Verizon’s tariff-based bills stated a
    proportional       charge    for     one   type    of   access,     but   omitted   a
    counterpart for the other type.                  See, e.g., J.A. 694 (billing
    57.14%     of   the    tariff      rate    for    switched     access     without   a
    corresponding line-item for special access).                    At trial, Verizon
    presented evidence that these omissions were billing errors and
    that CoreTel had in all cases used the entire facility.                      CoreTel
    disputed    that      evidence,      arguing     that   the   omissions     actually
    9 “Special access” occurs when the facility in question is
    used   for  a   dedicated,  exclusive  connection  between  two
    particular users.     Under “switched access,” in contrast, a
    facility is not dedicated to a particular end user. See, e.g.,
    WorldCom, Inc. v. Fed. Commc’ns Comm’n, 
    238 F.3d 449
    , 453 (D.C.
    Cir. 2001).   A detailed understanding of the difference is not
    necessary here--the salient points are that Verizon’s tariffs
    establish a different rate for each type of access, and that
    Verizon charged a blended rate when a single facility was used
    for both types.
    18
    showed       that     CoreTel       had      used       only     part       of     the       relevant
    facilities        and    should     therefore          be     charged       only   part       of    the
    TELRIC rate for those facilities.
    The       district      court      found        that    “[t]he       invoices         do     not
    support CoreTel’s argument,” and that the relevant facilities
    “were       entirely      dedicated          to    CoreTel’s          use,”      and     therefore
    included 100% of the TELRIC rate for the relevant facilities in
    its damages calculation.                J.A. 448.           We will overturn a district
    court’s      factual      finding       as    clearly         erroneous       only      if    we    are
    “left with a definite and firm conviction that a mistake has
    been committed.”              Evergreen Int’l, S.A. v. Norfolk Dredging Co.,
    
    531 F.3d 302
    , 308 (4th Cir. 2008) (citation omitted).                                    And “[i]n
    cases       in   which    a    district       court’s         factual       findings         turn    on
    assessments         of        witness        credibility         or     the        weighing          of
    conflicting evidence during a bench trial, such findings are
    entitled to even greater deference.”                        
    Helton, 709 F.3d at 350
    .
    Here, the district court’s finding that CoreTel used 100%
    of    the    facilities        in   question        was       based    on    its     weighing        of
    conflicting evidence--Verizon’s original bills charging CoreTel
    for only part of certain facilities against Verizon’s evidence
    that those original bills were mistaken.                              CoreTel contends that
    the     district         court      should          have        weighed          that        evidence
    differently, but falls far short of showing that the district
    court       clearly      erred.         Accordingly,           we     affirm       the       district
    19
    court’s     determination          that      CoreTel         owes    Verizon    100%    of   the
    TELRIC rate for the facilities CoreTel used.
    6.
    Finally, we address CoreTel’s contention that the district
    court should have applied the two-year statute of limitations
    set   out    in    47    U.S.C.       §    415(a),          which    requires    that   “[a]ll
    actions      at    law    by     carriers          for       recovery     of    their    lawful
    charges . . . be begun within two years from the time the cause
    of action accrues.”              Were that statute of limitations to apply,
    Verizon would be barred from seeking facilities charges incurred
    before    July     2010.         We    hold      that       CoreTel    waived    reliance     on
    47 U.S.C. § 415(a) by failing to raise this defense below.
    Before      the     district         court,       CoreTel       never    mentioned     the
    statute     of    limitations         in    47    U.S.C.       §    415(a).      Instead,     it
    sought      to    apply    the        statute          of    limitations       set   forth    in
    subsection (b) of the same statute, which applies to “complaints
    against     carriers       for     the      recovery         of     damages    not   based    on
    overcharges.”       47 U.S.C. § 415(b).                     The parties’ briefing before
    the district court focused on whether the section 415(b) statute
    of    limitations          could          apply        to     an     action     between      two
    telecommunications             carriers           concerning          a    breach       of    an
    interconnection agreement, as opposed to a complaint against a
    telecommunications carrier by a customer of that carrier.                                    The
    district court declined to apply section 415(b), and CoreTel
    20
    does not take issue with that decision on appeal.                                  Rather, it
    attempts     to     show     that     it     sufficiently         raised     a    statute-of-
    limitations         defense     based       on    section     415(a)    to       preserve    the
    issue for appeal.
    When      a    party      fails       to    raise      a    statute-of-limitations
    defense before the district court, it waives the right to do so
    on appeal.          See, e.g., Verizon Md., Inc. v. Global NAPS, Inc.,
    
    377 F.3d 355
    , 369 (4th Cir. 2004).                        It is not enough for a party
    to raise “a non-specific objection or claim.”                           In re Under Seal,
    
    749 F.3d 276
    , 287 (4th Cir. 2014).                           “[I]f a party wishes to
    preserve an argument for appeal, the party must press and not
    merely intimate the argument during the proceedings before the
    district court.”            
    Id. (citation omitted).
                    In other words, the
    party must raise the argument in a manner sufficient “to alert
    the   district       court      to    the    specific        reason”    the      party    seeks
    relief.      United States v. Bennett, 
    698 F.3d 194
    , 199 (4th Cir.
    2012).
    In   support         of   its       contention       that    it   sought       to    apply
    section 415(a) before the district court, CoreTel points only to
    (1) its statement in its answer that Verizon’s counterclaims are
    “barred by the statute of limitations,” J.A. 94; (2) a reference
    in its post-bench-trial proposed findings of fact to section 415
    in    general       (without      specifying          a    subsection);       and    (3)    its
    citation     of      a     case      to     the       district     court      that    applied
    21
    section 415(b), but whose reasoning (CoreTel asserts) is equally
    applicable to section 415(a).             See Reply Br. at 29.                 In none of
    these instances did CoreTel invoke section 415(a) with anything
    close to the specificity that would have been required to alert
    the   district     court    that    it    needed      to   analyze       whether         that
    statute might bar certain damages Verizon sought.                         Accordingly,
    CoreTel    has    waived    any     right      it    may    have    had        to   assert
    section 415(a)’s statute of limitations on appeal.
    D.
    Having     affirmed   the     district        court’s   calculation           of    the
    TELRIC-based facilities charges CoreTel owes Verizon, we turn to
    CoreTel’s challenge of the district court’s award of $138,724.47
    in late fees to Verizon.            CoreTel argues (1) that it cannot owe
    late fees under the ICAs because Verizon has never issued it
    formal bills at the proper TELRIC rates, (2) that Virginia law
    limits    any    late   fees   to    5%   per       year   rather       than    the      ICA-
    prescribed 18% per year that the district court imposed, and
    (3) that the principal on which any late fees are calculated
    should be offset by certain payments Verizon has withheld from
    CoreTel during the course of this litigation.                           As we explain
    below, we do not find CoreTel’s arguments persuasive.
    1.
    CoreTel     argues    that    Verizon’s         failure      to    issue      formal
    TELRIC-based bills precludes Verizon from charging late fees.
    22
    As   a    general    matter,     the    ICAs’     billing           provisions      plainly
    authorize late fees.           Section 28.8.1 of the ICAs requires each
    party to submit “on a monthly basis an itemized statement of
    charges     incurred    by     the     other    Party          during      the   preceding
    month(s)     for     services,       facilities       or       arrangements        provided
    hereunder.”         J.A. 546.        Section 28.8.7 of the ICAs subjects
    CoreTel to a late-payment charge on any “[c]harges which are not
    paid by the due date stated on Verizon’s bill.”                         J.A. 547.
    Verizon issued monthly bills to CoreTel, but its bills were
    based on tariff rates.               We have held that those rates were
    improper.       See CoreTel 
    I, 752 F.3d at 372
    .                     But when the party
    receiving a bill disputes the amount purportedly due, the ICAs
    do not permit that party to refuse to pay anything at all for
    the billed services.           Rather, under Section 28.8.3, the party
    remains     obligated    to     “pay    when    due        .    .   .    all     undisputed
    amounts.”       J.A. 546.       CoreTel has never argued that it should
    receive    facilities     from       Verizon    for    free;         its    position    has
    always been that it should pay under TELRIC rates.                             But CoreTel
    elected not to pay even that undisputed amount--an amount it
    could    have    estimated     based    on     the    information           in   Verizon’s
    23
    tariff-based bills.             CoreTel therefore incurred late fees under
    the ICAs. 10
    2.
    CoreTel further argues that Virginia law requires any late-
    fee award to be limited to 5% per year.                         CoreTel relies on Va.
    Code Ann. § 6.2-400, which provides that “[a]ny lender or seller
    may impose a late charge for failure to make timely payment of
    any installment due on a debt, whether installment or single
    maturity, provided that such late charge does not exceed five
    percent   of    the      amount       of   such    installment           payment.”          Here,
    Verizon   sought         and    the    district        court    awarded        late      fees   at
    18% per year (1.5% per month) based on the ICAs’ provision in
    Section 28.8.7 that late fees “shall be an amount specified by
    Verizon   which         shall    not    exceed     a    rate    of       one   and    one    half
    percent   .    .    .    of     the    overdue     amount      (including          any    unpaid
    previously billed late payment charges) per month.”                             J.A. 547.
    Once      an   ICA        has     been   approved         by    a     state      utilities
    commission, its provisions are not subject to attack on state-
    10 CoreTel also contends that Verizon waived any right to
    collect late fees because each of the monthly bills in the
    record contain a line item specifying $0.00 in “Late Payment
    Charges Applied.”    See J.A. 639, 714, 753.   The ICAs’ anti-
    waiver provision bars this argument. See ICA § 28.18, J.A. 551
    (“A failure or delay of either Party to enforce any of the
    provisions hereof, to exercise any option which is herein
    provided, or to require performance of any of the provisions
    hereof shall in no way be construed to be a waiver of such
    provisions or options.”).
    24
    law grounds.        In Core Commc’ns, Inc. v. Verizon Md. LLC, we
    explained that, by requiring state-commission approval of ICAs,
    the    Act    “creates      a    narrowly      defined    time    and     forum     for
    identifying       and   evaluating      any    state-level      policy    that    might
    invalidate part or all of an ICA,” rendering ICAs immune from
    “any subsequent attack on the basis of a state law principle.”
    
    744 F.3d 310
    , 323 (4th Cir. 2014).                  Virginia’s state utilities
    commission approved both of the ICAs at issue here, including
    their late-fee provisions.             Thus, CoreTel may not now claim that
    those provisions violate Virginia law. 11
    3.
    Finally, CoreTel argues that the district court should have
    reduced the principal amount on which CoreTel’s late fees were
    calculated to account for certain payments Verizon has withheld
    from    CoreTel     during       the   course    of    this     litigation.         The
    withholdings in question arise from the terms of the stay of
    judgment     the   district       court   entered     pending    our     decision   in
    CoreTel      I.     Under       that   judgment,      Verizon    would    have    been
    entitled to a net payment from CoreTel of $890,000.                        J.A. 101–
    02, 105.      Rather than posting a bond as a condition for the stay
    pending appeal, CoreTel agreed that Verizon would be able to
    11
    This principle also dooms CoreTel’s argument that the
    district court’s late-charges award constitutes impermissible
    liquidated damages under Virginia law.
    25
    withhold    future      reciprocal-compensation            payments    from    CoreTel
    “to satisfy in part the stipulated judgment.”                      J.A. 104.    After,
    in    CoreTel    I,    we    reversed      and   remanded    the    portion    of     the
    district    court’s         judgment      dealing   with    Verizon’s       facilities
    claims, the parties did not re-negotiate the terms of the stay,
    and    Verizon        continued      to     withhold       reciprocal-compensation
    payments.       At the time of the bench trial, Verizon had withheld
    approximately $92,000.             See J.A. 264.
    CoreTel    contends         that    every    time     Verizon       withheld    a
    reciprocal-compensation payment that would otherwise have been
    due   to   CoreTel,     CoreTel’s         outstanding    balance     for    facilities
    charges should have been reduced by an equal amount.                           But the
    terms of the stay provide no support for CoreTel’s position.
    The stay requires only that Verizon apply the withheld payments
    “to satisfy in part the stipulated judgment,” and do not specify
    any particular portion of the judgment to which the payments
    must be applied.            Thus, Verizon was free to apply its withheld
    payments however it saw fit.                 For example, Verizon could have
    paid down the late fees themselves instead of the principal on
    which the late fees are calculated.                     The evidence before the
    district court did not establish exactly how Verizon applied the
    withheld    payments,        but    it    did    make   clear   that    Verizon       had
    applied them in a way that did not reduce CoreTel’s outstanding
    facilities charges.           Thus, the district court properly based its
    26
    late-fee calculation on the entire amount of those outstanding
    facilities charges.
    III.
    For the foregoing reasons, the judgment of the district
    court is
    AFFIRMED.
    27