Sec. 36.152  Categories of Cable and Wire Facilities (C&WF).

    (a) C&WF are basically divided between exchange and interexchange. 
Exchange C&WF consists of the following categories:
    (1) Exchange Line C&WF Excluding Wideband--Category 1--This category 
includes C&W facilities between local central offices and subscriber 
premises used for message telephone, TWX subscriber lines, private line, 
local channels, and for circuits between control terminals and radio 
stations providing very high frequency maritime service or urban or 
highway mobile service.
    (2) Wideband and Exchange Trunk C&WF--Category 2--This category 
includes all wideband, including Exchange Line Wideband and C&WF between 
local central offices and Wideband facilities. It also includes C&WF 
between central offices or other switching points used by any common 
carrier for interlocal trunks wholly within an exchange or metropolitan 
service area, interlocal trunks with one or both terminals outside a 
metropolitan service area carrying some exchange traffic, toll 
connecting trunks, tandem trunks principally carrying exchange traffic, 
the exchange trunk portion of TWX and WATS access lines the exchange 
trunk portion of private line local channels, and the exchange trunk 
portion of circuits between control terminals and radio stations 
providing very high frequency maritime service or urban or highway 
mobile service.
    (3) The procedures for apportioning the cost of exchange cable and 
wire facilites among the operations are set forth in Secs. 36.154 and 
36.155.
    (b) Interexchange C&WF--Category 3--This category includes the C&WF 
used for message toll and toll private line services. It includes cable 
and wire facilities carrying intertoll circuits, tributary circuits, the 
interexchange

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channel portion of special service circuits, circuits between control 
terminals and radio stations used for overseas or coastal harbor 
service, interlocal trunks between offices in the different exchange or 
metropolitan service areas carrying only message toll traffic and 
certain tandem trunks which carry principally message toll traffic.
    (1) The procedures for apportioning the cost of interexchange cable 
and wire facilities among the operations are set forth in Sec. 36.156.
    (c) Host/Remote Message C&WF--Category 4--This category includes the 
cost of message host/remote location C&WF for which a message circuit 
switching function is performed at the host central office. It applies 
to C&WF between host offices and all remote locations. The procedures 
for apportioning the cost of these facilities among the operations are 
set forth in Sec. 36.157.