A-2 List of terms
CPB
Call Processing Busy
CPU
Call Pickup
CR
carriage return
dc
direct current
DLM
digital line module
DN
Directory Number
DTE
data terminal equipment
DTR
data terminal ready
EDPC
enhanced digital port card
EIA
Electronic Industries Association
ERWT
expensive route warning tone
ETS
electronic telephone set
FCC
Federal Communications Commission
HASU Set
Hardware Asigned, Software Unassigned
ID
Identification
IPE
intelligent peripheral equipment
555-4001-110 Standard 09.03 July, 2002