[Code of Federal Regulations]
[Title 47, Volume 3]
[Revised as of October 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR52.27]

[Page 88-89]
 
                       TITLE 47--TELECOMMUNICATION
 
        CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED)
 
PART 52_NUMBERING--Table of Contents
 
                      Subpart C_Number Portability
 
Sec. 52.27  Deployment of transitional measures for number portability.

    (a) All LECs shall provide transitional number portability measures, 
as defined in section 52.21(q) of this chapter, 47 CFR 52.21(q), as soon 
as reasonably possible upon receipt of a specific request from another 
telecommunications carrier, until such time as the LEC implements a 
long-term database method for number portability in that area.
    (b) A LEC must provide the particular transitional number 
portability

[[Page 89]]

measure requested by a telecommunications carrier, except as set forth 
in paragraph (c) of this section.
    (c) A LEC that does not provide a requested transitional number 
portability measure must demonstrate that provision of the requested 
transitional number portability measure either is not technically 
feasible or if technically feasible, is unduly burdensome.
    (1) Previous successful provision of a particular transitional 
number portability measure by any LEC constitutes substantial evidence 
that the particular method is technically feasible.
    (2) In determining whether provision of a transitional number 
portability measure is unduly burdensome, relevant factors to consider 
are the extent of network upgrades needed to provide that particular 
method, the cost of such upgrades, the business needs of the requesting 
carrier, and the timetable for deployment of a long-term number 
portability method in that particular geographic location.
    (d) LECs must discontinue using transitional number portability 
measures in areas where a long-term number portability method has been 
implemented.

[63 FR 68203, Dec. 10, 1998]