Zhone Technologies 800 - Manual (Page 67)

Server Cards IMACS System Release 5.1.6 4-1
ACS-PRI/BRI Card Introduction
Chapter 4
ACS-PRI/BRI Card
4.1 Introduction
The ACS-PRI/BRI server card (881162) uses 651xx firmware and offers users the ability to
effectively terminate and manage both dedicated and switched carrier services in a single
system. This capability allows users to pick the most cost-effective services for both
permanent connections (e.g., LAN-to-WAN) and periodic connections (e.g., video
conferencing). In addition it also enables originating and receiving calls to BRI cards.
Three specific features enable the system to use ACS-PRI/BRI services, and are covered in
this chapter. These features are:
• ACS-PRI/BRI server card
• Call profiles (accessed from the Interface Card)
• HSU-AD 530/35 switched services data card
The switched services HSU card information is repeated in the chapter on HSU cards, and the
call profile information is repeated in the Interface Card chapter.
4.1.1 Definitions
4.1.1.1 Timeslot
Each T1 or E1 WAN link accessed by the system is subdivided into individual 64 kbps
channels called timeslots (T1 has 24 timeslots, E1 has 32). A timeslot is sometimes also called
a DS0 or a B (bearer) channel. While all three terms refer to the same concept, this manual
will assign arbitrary definitions to distinguish timeslots controlled by ISDN from those that
are not.
4.1.1.2 DS0
A DS0 is a timeslot on any WAN link that is not controlled by an ISDN signaling channel
(the D channel). Thus, DS0s are controlled via assigning user ports to WAN timeslots (see
individual user card chapters) and via setting up cross-connect circuits (see Chapter 4, System
Configuration and Operation in the System Reference Guide).