LATA (Local Area Transport
Area) - Telephone companies have divided
some of their service areas into long distance calling areas called "LATA's".
Your local phone company handles calls made within your LATA (Intra-Lata).
The locations of your telephone is within a LATA. Your Phone Company
uses this LATA for calculating you billing for calls made within your
LATA and from one LATA to another LATA.
The time delay for a signal (usually data) to
propagate through a system. For instance, when accessing the Internet,
when you enter a character into your PC, there is a measurable amount of
time before that signal actually appears at the several points while
traveling to its destination. Every element in that travel has its
individual delay. Latency is that time delay.
Leased Line --
Usually refers to a twisted pair (phone line)
that is Leased (rented), usually from your phone company, for exclusive 24/7 use from one
location to another location. Leased lines do not carry voltages like
dial-up lines, nor do they ring the telephone lines or go "off hook"
(the line is connected 100% of the time). The highest speed data
connections require a leased line of some type. Also known as "Dedicated
Pair". See also Nailed-up
LEC (Local Exchange Carrier)
-- In the U.S., the "local phone
company." If it used to be part of the Bell System (that is, owned by
AT&T), then the LEC is owned by one of the seven RBOCs. Otherwise, the
LEC is one of the hundreds of rural telephone companies that were never
part of the Bell System and typically have under a few thousand
subscribers each (though some have 500,000 or more). LECs own the
central office(s) and the local loop (the cable from the C.O. to each of
their subscribers) to provide communications services within a limited
geographic area (called a LATA). After the AT&T divestiture, LECs were
restricted from providing long-distance services (and the IXCs were
restricted from providing local service), though this is changing. LECs
can charge (that is, the call is a toll call) for longer-distance calls
within their own territories.
Legacy Equipment -
Any equipment that has come from
predecessor or past equipment. Legacy equipment designs usually must
maintain features and compatibility with the equipment of which it is
replacing or complementing .
LSO (Local Switch Office) --
The central telephone office of which services your telephone.