Sec.  36.126   Circuit equipment—Category 4.

   (a) For the purpose of this section, the term “Circuit Equipment”
   encompasses the Radio Systems and Circuit Equipment contained in Accounts
   2230 through 2232 respectively. It includes central office equipment, other
   than switching equipment and automatic message recording equipment, which is
   used to derive communications transmission channels or which is used for the
   amplification, modulation, regeneration, testing, balancing or control of
   signals transmitted over communications transmission channels. Examples of
   circuit equipment in general use include:

   (1) Carrier telephone and telegraph system terminals.

   (2) Telephone and telegraph repeaters, termination sets, impedance
   compensators, pulse link repeaters, echo suppressors and other intermediate
   transmission amplification and balancing equipment except that included in
   switchboards.

   (3) Radio transmitters, receivers, repeaters and other radio central office
   equipment except message switching equipment associated with radio systems.

   (4) Composite ringers, line signaling and switching pad circuits.

   (5) Concentration equipment.

   (6) Composite sets and repeating coils.

   (7) Program transmission amplifiers, monitoring devices and volume
   indicators.

   (8) Testboards, test desks, repair desks and patch bays, including those
   provided for test and control, and for telegraph and transmission testing.

   (b) For apportionment among the operations, the cost of circuit equiment is
   assigned to the following subsidiary categories:

   (1) Exchange Circuit Equipment—Category 4.1.

   (i) Wideband Exchange Line Circuit Equipment—Category 4.11.

   (ii) Exchange Trunk Circuit Equipment (Wideband and Non-Wideband)—Category
   4.12.

   (iii) Exchange Line Circuit Equipment Excluding Wideband—Category 4.13.

   (2) Interexchange Circuit Equipment—Category 4.2.

   (i) Interexchange Circuit Equipment Furnished to Another Company for
   Interstate Use—Category 4.21.

   (ii) Interexchange Circuit Equipment Used for Wideband Services including
   Satellite and Earth Station Equipment used for Wideband Service—Category
   4.22.

   (iii) All Other Interexchange Circuit Equipment—Category 4.23.

   (3) Host/Remote Message Circuit Equipment—Category 4.3.

   (4) In addition, for the purpose of identifying and separating property
   associated with special services, circuit equipment included in Categories
   4.12 (other than wideband equipment) 4.13 and 4.23 is identified as either
   basic circuit equipment, i.e., equipment that performs functions necessary
   to provide and operate channels suitable for voice transmission (telephone
   grade channels), or special circuit equipment, i.e., equipment that is
   peculiar to special service circuits. Carrier telephone terminals and
   carrier telephone repeaters are examples of basic circuit equipment is
   general use, while audio program transmission amplifiers, bridges,
   monitoring devices and volume indicators, telegraph carrier terminals and
   telegraph repeaters are examples of special circuit equipment in general
   use. Cost of exchange circuit equipment included in Categories 4.12 and 4.13
   and the interexchange circuit equipment in Categories 4.21, 4.22 and 4.23
   are segregated between basic circuit equipment and special circuit equipment
   only at those locations where amounts of interexchange and exchange special
   circuit equipment are significant. Where such segregation is not made, the
   total costs in these categories are classified as basic circuit equipment.

   (5) Effective July 1, 2001, through June 30, 2006, study areas subject to
   price cap regulation, pursuant to  Sec. 61.41, shall assign the average balances
   of Accounts 2230 through 2232 to the categories/subcategories as specified
   in  Sec.  Sec. 36.126(b)(1) through (b)(4) based on the relative percentage assignment
   of the average balances of Accounts 2230 through 2232 costs to these
   categories/subcategories during the twelve month period ending December 31,
   2000.

   (c) Apportionment of Exchange Circuit Equipment Among the Operations:

   (1) Wideband Exchange Line Circuit Equipment—Category 4.11—The cost of
   exchange circuit equipment in this category is determined separately for
   each wideband facility. The respective costs are allocated to the
   appropriate operation in the same manner as the related exchange line cable
   and wire facilities described in  Sec. 36.155.

   (2) Exchange Trunk Circuit Equipment (Wideband and Non-Wideband)—Category
   4.12—The cost of exchange circuit equipment associated with this category
   for the study area is allocated to the appropriate operation in the same
   manner as the related exchange trunk cable and wire facilities as described
   in  Sec. 36.155.

   (3) Exchange Line Circuit Equipment Excluding Wideband—Category 4.13—The
   cost of Circuit Equipment associated with exchange line plant excluding
   wideband for the study area is assigned to subcategories and is allocated to
   the appropriate operation in the same manner as the related exchange line
   cable and wire facilities for non-wideband service as described in  Sec. 36.154.

   (4) Effective July 1, 2001, through June 30, 2006, all study areas shall
   apportion costs in the categories/subcategories, as specified in
    Sec.  Sec. 36.126(b)(1) through (b)(4), among the jurisdictions using the relative
   use measurements or factors, as specified in  Sec.  Sec. 36.126(c)(1) through (c)(3)
   for the twelve month period ending December 31, 2000. Direct assignment of
   any subcategory of Category 4.1 Exchange Circuit Equipment to the
   jurisdictions shall be updated annually.

   (d) Apportionment of Interexchange Circuit Equipment among the Operations:
   Procedures to be Used by Interexchange Carriers.

   (1) Interexchange Circuit Equipment Furnished to Another Company for
   Interstate Use—Category 4.21—This category comprises that circuit equipment
   provided for the use of another company as an integral part of its
   interexchange circuit facilities used wholly for interstate services. This
   category includes such circuit equipment as telephone carrier, terminals
   telegraph carrier terminals, and microwave systems used wholly for
   interstate services. The total cost of the circuit equipment in this
   category for the study area is assigned to the interstate operation.

   (2) Interexchange Circuit Equipment Used for Wideband Service—Category
   4.22—This category includes the circuit equipment portion of interexchange
   channels used for wideband services. The cost of interexchange circuit
   equipment in this category is determined separately for each wideband
   channel and is segregated between message and private line services on the
   basis of the use of the channels provided. The respective costs are
   allocated to the appropriate operation in the same manner as the related
   interexchange cable and wire facilities as described in  Sec. 36.156.

   (3) All Other Interexchange Circuit Equipment—Category 4.23—This category
   includes the cost of all interexchange circuit equipment not assigned to
   Categories 4.21 and 4.22. Interexchange carriers shall freeze the allocation
   factors for Category 4.23 investment at levels reached on December 31, 1985,
   derived by using the procedures in effect at that time. On January 1, 1988,
   and thereafter, that frozen allocation factor shall be applied to each
   interexchange carrier's Category 4.23 investment to derive the interstate
   allocation. On January 1, 1988, and thereafter, the amount of investment
   allocated to the interstate jurisdiction will vary but the relative
   proportion of the total investment that is allocated to the interstate
   jurisdiction will remain frozen at 1985 levels.

   (e) Apportionment of Interexchange Circuit Equipment among the Operations:
   Procedures To Be Used by Exchange Carriers.

   (1) Interexchange Circuit Equipment Furnished to Another Company for
   Interstate Use—Category 4.21—This category comprises that circuit equipment
   provided for the use of another company as an integral part of its
   interexchange circuit facilities used wholly for interstate services. This
   category includes such circuit equipment as telephone carrier terminals
   telegraph carrier terminals, and microwave systems used wholly for
   interstate services. The total cost of the circuit equipment in this
   category for the study area is assigned to the interstate operation.

   (2) Interexchange Circuit Equipment Used for Wideband Service—Category
   4.22—This category includes the circuit equipment portion of interexchange
   channels used for wideband services. The cost of interexchange circuit
   equipment in this category is determined separately for each wideband
   channel and is segregated between message and private line services on the
   basis of the use of the channels provided. The respective costs are
   allocated to the appropriate operation in the same manner as the related
   interexchange cable and wire facilities described in  Sec. 36.155.

   (3) All Other Interexchange Circuit Equipment—Category 4.23—This category
   includes the cost of all interexchange circuit equipment not assigned to
   Categories 4.21 and 4.22. The cost of interexchange basic circuit equipment
   used for the following classes of circuits is included in this category:
   Jointly used message circuits, i.e., message switching plant circuits
   carrying messages from the state and interstate operations; circuits used
   exclusively for TWX service; circuits uses for interstate private line
   service; and circuits used for state private line services.

   (i) An average interexchange circuit equipment cost per equivalent
   interexchange telephone termination for all circuits is determined and
   applied to the equivalent interexchange telephone termination counts of each
   of the following classes of circuits: Interstate Private Line, State Private
   Line, Message, and TWX. The cost of interstate private line circuits is
   assigned directly to the interstate operation. The cost of state private
   line circuits is assigned directly to the state operation. The cost of
   message circuits is apportioned between the state and interstate operations
   on the basis of the relative number of study area conversation-minutes
   applicable to such facilities.

   (ii) The cost on interexchange circuit equipment assigned TWX circuits is
   apportioned between state and interstate toll in accordance with
    Sec. 36.126(e)(3)(i) and pursuant to the following procedures. The cost of
   circuit equipment associated with the TWX intertoll circuits used jointly
   for state and interstate operations is apportioned between the operations on
   the basis of the relative number of study area TWX connection-minutes
   applicable to such facilities. The cost of circuit equipment associated with
   the interexchange portion of the TWX remote access lines is apportioned
   between state and interstate operation on the basis of the relative number
   of study area TWX connection-minutes applicable to those facilities.

   (iii) The cost of special circuit equipment is segregated among TWX service,
   telegraph grade private line services and other private line services based
   on an analysis of the use of the equipment and in accordance with
    Sec. 36.126(b)(4). The cost of TWX special circuit equipment is apportioned on
   the same basis as that used for intertoll TWX circuits. The special circuit
   equipment cost assigned to telegraph grade and other private line services
   is directly assigned to the appropriate operation.

   (4) Effective July 1, 2001, through June 30, 2006, all study areas shall
   apportion costs in the categories/subcategories specified in  Sec.  Sec. 36.126(e)(1)
   through (e)(3) among the jurisdictions using relative use measurements or
   factors, as specified in  Sec.  Sec. 36.126(e)(1) through (e)(3) for the twelve month
   period ending December 31, 2000. Direct assignment of any subcategory of
   Category 4.2 Interexchange Circuit Equipment to the jurisdictions shall be
   updated annually.

   (f) Apportionment of Host/Remote Message Circuit Equipment Among the
   Operations.

   (1) Host/Remote Message Circuit Equipment—Category 4.3. This category
   includes message host/remote location circuit equipment for which a message
   circuit switching function is performed at the host central office
   associated with cable and wire facilities as described in  Sec. 36.152(c).

   (i) The category 4.3 cost of host/remote circuit equipment assigned to
   message services for the study area is apportioned among the exchange,
   intrastate toll, and interstate toll operations on the basis of the
   assignment of host/remote message cable and wire facilities as described in
    Sec. 36.157.

   (ii) [Reserved]

   (2) Effective July 1, 2001, through June 30, 2006, all study areas shall
   apportion costs in the subcategory specified in  Sec. 36.126(f)(1) among the
   jurisdictions using the allocation factor, as specified in  Sec. 36.126(f)(1)(i),
   for this subcategory for the twelve month period ending December 31, 2000.
   Direct assignment of any Category 4.3 Host/Remote Message Circuit Equipment
   to the jurisdictions shall be updated annually.

   [ 52 FR 17229 , May 6, 1987, as amended at  53 FR 33012  Aug. 29, 1988;  66 FR 33205 , June 21, 2001;  69 FR 12550 , Mar. 17, 2004]

Information Origination/Termination (IOT) Equipment