are there any acronyms or abbreviations that i am missing?

Hi, Joe - here are a few others that I could think of without thinking too much :-) . If you want to get into common terms for various calling features, then the list really expands a lot, with many variations depending on switch type (5ESS, DMS100, GTD5 and so on).

Lots of telcos are now into cable TV service - which blurs the line between telco functionality and cable TV company functionality.

What level of detail are you looking for?

ccw - cancel call waiting

cff - call forward fixed

cfv - call forward variable

cocot - company owned coin operated telephone

cos - class of service

cot - coin operated telephone

dn - directory number

dor - deny origination

dsl - digital subscriber line

dslam - digital subscriber line access multiplexer

dtm - deny termination

dtmf - dual tone multi-frequency

fx - foreign exchange

interlata - between other latas

intralata - within one lata

ipic - preferred intralata carrier

lata - local access and transport area

len - line equipment number

pic - preferred interlata carrier (I think)

rax - rate area exchange

rtu - remote test unit

scos - secondary class of service

ss7 - signaling system #7

S&E - service and equipment codes

tdm - time division multiplexing

tdn - toll denial

Acronyms. An abbreviation uses part of a word for a shortened form. An acronym is made from two or more words and is the use of all or some of the first letters of the words for a shortened form. The use of acronyms specific to a particular field or interest is part of what is called "jargon." An abbreviation that makes another English word takes a period; such as "in." but others, like "mm" do not.

RTS.. (ring-tip-sleeve) service. Used by many business, police and toll free customers for caller ID..(even with blocking.) D/A or D2A...Digital to Analog converter.