Table of Contents
Advertisement
Aria-34e
Digital Key Telephone System
Receiver Unit (DTRU) for detecting DTMF tones for Single Line devices, for DISA and
functionality of the DVIB. Each DTRU contains two detection circuits that are time shared
under software control.
One CMU must be provided for each Loop Start CO Line port which requires call metering
detection. In addition, the appropriate type of CMU must be employed to match the type of meter
pulse service used.
Each CPTU contains two tone detection circuits that are time shared under software control.
These detectors are used to support of several features including ACNR (Automatic Call Number
Redial). If such features are to be used, it is recommended that one (1) CPTU is installed for
every 4LCO/LCOB.
An optional PFTU-I can be installed on the 4LCO only. This module supports power failure
transfer function of the first two (2) CO lines of the 4LCO board.
Board
4LCO
SLOT #3
LCOB
SLOT #4~7
Aria Communications Pty Ltd.
A.C.N. 090 723 925
Slot
No. Ports
4
CPTU, CMU, DTRU,
PFTU-I
4
CPTU, CMU, DTRU
Figure 12. 4LCO CARD
Figure 13. LCOB CARD
4-19
Installation
Option Boards
Rev 1.3
Advertisement
Table of Contents
