Sec. 68.110  Compatibility of the telephone network and terminal 
          equipment.

    (a) Availability of interface information. Technical information 
concerning interface parameters not specified in this part, including 
the number of ringers which may be connected to a particular telephone 
line, which is needed to permit terminal equipment to operate in a 
manner compatible with telephone company communications facilities, 
shall be provided by the telephone company upon request.
    (b) Changes in telephone company facilities, equipment, operations 
or procedures. The telephone company may make changes in its 
communications facilities, equipment, operations or procedures, where 
such action is reasonably required in the operation of its business and 
is not inconsistent with the rules and regulations in this part. If such 
changes can be reasonably expected to render any customer's terminal 
equipment incompatible with telephone company communications facilities, 
or require modification or alteration of such terminal equipment, or 
otherwise materially affect its use or performance, the customer shall 
be given adequate notice in writing, to allow the customer an 
opportunity to maintain uninterrupted service.
    (c) Availability of inside wiring information. Any available 
technical information concerning wiring on the customer side of the 
demarcation point, including copies of existing schematic diagrams and 
service records, shall be provided by the telephone company upon request 
of the building owner or agent thereof. The telephone company may charge 
the building owner a reasonable fee for this service, which shall not 
exceed the cost involved in locating and copying the documents. In the 
alternative, the telephone company may make these documents available 
for review and copying by the building owner. In this case, the 
telephone company may charge a reasonable fee, which shall not exceed 
the cost involved in making the documents available, and may also 
require the building owner to pay a deposit to guarantee the documents' 
return.

[ 45 FR 20841 , Mar. 31, 1980, as amended at  62 FR 36464 , July 8, 1997]