Instruction manual

Managing trunks
2 Issue 3 July 2001 Send feedback: [e-mail]
CAMA Centralized Automatic Message Accounting (CAMA) trunks
route emergency calls to the local community’s Enhanced 911
systems.
CO Central Office (CO) trunks typically connect your switch to the
local central office, but they can also connect adjuncts such as
external paging systems and data modules.
CPE Customer Premise Equipment (CPE) trunks connect adjuncts,
such as pagers and announcement or music sources, to the
switch.
DID Direct inward dialing (DID) trunks connect incoming calls
directly to internal extensions without going through an
attendant or some other central point.
DIOD Direct inward and outward dialing (DIOD) trunks connect
incoming and outgoing calls directly to your switch.
DMI-BOS Digital multiplexed interface bit-oriented signaling
(DMI-BOS) trunks connect a switch to a host computer, or one
switch to another switch.
FX Foreign exchange (FX) trunks connect calls to a non-local
central office as if it were a local central office. Use FX trunks
to reduce long distance charges if your organization averages a
high volume of long-distance calls to a specific area code.
trunk group description