Lucent Technologies Definity Audix System Release 4.0 - Manual (Page 20)

DEFINITY AUDIX System Release 4.0
System Description Pocket Reference
585-300-214
Issue 1
May 1999
Design and Operation
2-4 Hard Disk Drive
Networking features. In its maximum configuration, the DEFINITY AUDIX
system can connect through this Digital Networking channel to up to 100
remote systems, or
nodes . 2
Digital Networking offers several advantages over AMIS Analog
Networking:
■ Digital Networking is more secure than AMIS Analog Networking.
■ Digital Networking uses Lucent Technologies’ Digital
Communications Protocol (DCP) to send subscriber profiles and
message status information along with messages, while AMIS
does not send this information.
■ Digital Networking messages have higher voice quality than
AMIS messages because Digital Networking uses CELP
encoding.
There is one important consideration, however, for customers who want
to use Digital Networking. If customers use Digital Networking, the
DEFINITY AUDIX system will have a maximum of 8 voice ports, rather
than 12.
Table 2-1 shows the maximum number of voice ports the
DEFINTIY AUDIX system can have with and without Digital Networking.
High-speed Digital Networking Connections
The DEFINTIY AUDIX system offers three types of Digital Networking
configurations: DCP Mode 1, DCP Mode 2, and DCP Mode 3.
DCP Mode 1 and DCP Mode 3 connections are high-speed Digital
Networking connections. DCP Mode 1 and DCP Mode 3 connections
require high-speed facilities to operate, but these connections offer
advantages where there is heavy voice messaging traffic among
customer sites. These high-speed Digital Networking connections can
accommodate the maximum numbers of local subscribers (2000) and
remote subscribers (100,000) the system allows.
2. This configuration is only available with high-speed Digital
Networking connections.
Table 2-1. Maximum Voice Ports and Digital Networking Ports
Digital Networking ports Voice ports
Without Digital Networking 0 12 1
1. In switch releases earlier than Version 2, the system has a
maximum of 8 voice ports.
With Digital Networking 1 8