Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Features
A-50Trunk Group features
A
CAMA - E911 Trunk Group
Sends Caller’s Emergency Service Identification (CESID) information over
Centralized Automatic Message Accounting (CAMA) trunks to the local
community’s Enhanced 911 (E911) system through the local Central Office. The
information sent can be one of the following:
■ Each extension on the switch can send precise location information.
■ Groups of extensions can send the same location information; for example,
one number for Building A, one number for Building B, and so on.
■ If there are no CAMA trunks, the system sends the same location
information for all extensions at the site.
DS1 Trunk Service
Bit-oriented signaling that multiplexes 24 channels into a single 1.544 Mbps
stream. DS1 can be used for voice or voice-grade data and for data-transmission
protocols. E1 trunk service is bit-oriented signaling that multiplexes 32 channels
into a single 2.048 Mbps stream. Both DS1 and E1 provide a digital interface for
trunk groups.
E&M Signaling — Continuous and Pulsed
Provides continuous and pulsed E&M signaling. Continuous and pulsed E&M
signaling is a modification to the E&M signaling used in the United States.
Continuous E&M signaling is intended for use in Brazil, but can also be used in
Hungary. Pulsed E&M signaling is intended for use in Brazil.
ETSI Functionality
The full set of ETSI public-network and private-network ISDN features is officially
supported. This includes Look-ahead Routing and Usage Allocation. It does not
include Non-Facility Associated Signaling or D-Channel Backup.
Facility and Non-Facility Associated Signaling
Allows an ISDN-PRI DS1/E1 interface D-channel to carry signaling information for
B-channels (voice or data). D-Channel Backup can also be administered to
increase system reliability.