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(C) POPs

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Wireless  Interconnection  to  the  Public  Switched  Telephone  Network 

Interconnection  is  defined  as  the  point  where  any  two  (carriers')  networks  are  linked together.  It  can  involve  a  wireless  carrier's  connection  to  a  local  exchange  carrier  (LFQ a  landline  telco),  or  an  Internet  service  provider's  (ISP's)  connection  to  an  LEC,  or  an LEC's  connection  into  an  interexchange  carrier  (IXC).

Approximately  75%  of  all  cellular  telephone  calls  made  today  are  initiated  from mobile/portable  phones,  with  the  destination  being  a  landline  telephone.  This  number has  been  slowly  but  steadily  changing  to  the  point  where  more  traffic  is  being terminated  on  wireless  carriers'  phones.  These  types  of  calls  are  known  in  the  wireless industry  as  mobile-originated,  or  mobile-to-land  (M-L)  telephone  calls.  This  large volume  of  mobile-land  wireless  traffic,  it  is  imperative  that  a  wireless  carrier  develops and  maintains  a  cost-effective  series  of  interconnections  to  the  public  switched telephone  network  (PSTN).  The  public  switched  telephone  network  is  that  which  we  use every  day  to  place  our  telephone  calls,  whether  they  are  across  town,  cross-country  or across  the  world.  In  its  most  basic  form,  the  PSTN  is  accessed  every  time  a  person  picks up  a  telephone  and  hears  a  dial  tone.

To  develop  the  interconnections,  a  wireless  carrier  must  first  examine  where  to  place interconnections  and  what  type  of  interconnections  should  be  ordered.  This  decision  can be  based  on  several  factors.

First,  a  logical  location  for  connection  to  the  public  telephone  network  is  to  place  an interconnection,  also  known  as  a  point  of  presence  (POP).

Second,  cost  factors  must  be  taken  into  account  to  justify  the  placement  of  an interconnection.  

Third,  the  population  density  of  a  given  geographic  region  must  be  examined  to determine  whether  a  local  interconnection  will  suffice  or  whether  a  connection  that offers  low  cost-per-minute  charges  over  a  wider  area  is  more  appropriate. 

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