Ericsson LBI-39076B - Manual (Page 12)

LBI-39076B DESCRIPTION / INSTALLATION
12
The telephone line interface provides the following
functions for radio-originated calls:
•
Applies signaling to seize telephone line.
•
Detects signaling from telephone line.
•
Generates and applies telephone number digits to
telephone line.
•
Sends voice prompts to telephone line.
•
Detects end-of-call signaling from telephone line.
•
Removes signaling to drop telephone line.
One GTI converts the analog audio signal (from the
radio channel connected to it) into a digital signal for
placement onto the PCM/Data bus. Another GTI (or the
same GTI) converts the digital signal from the PCM/Data
bus back to an audio signal (for the telephone line connected
to it). A similar route is taken by the signal from the
telephone line to the radio channel. Each radio channel has
its own time slot on PCM/Data bus so as not to interfere
with any other radio channel.
GTI INTERFACE BOARD
The GTI Interface board serves as the information and
command interface between the Site Controller computer
and all the GTI units in the system. It is installed in only
one GTI unit, which then becomes the Master GTI.
GTI CONFIGURATOR SOFTWARE
The GTI Configurator software is a PC-based, menu-
driven program (supplied in both 3.5-inch and 5.25-inch
floppy formats) that allows the system operator to change
parameters in the GTI database, retrieve GTI call records,
and monitor the system activity.
IAM
The optional IAM (Interconnect Accounting Manager)
is a microprocessor-based call-detail buffer, containing two
megabytes of battery-backed RAM to provide storage for up
to 60,000 call detail records, compatible with the EDACS
Billing Correlation Unit. At the completion of each call, a
call detail record of that call is sent to the IAM. The IAM
provides a serial data port for a printer to be connected, to
print real-time records of calls being placed on the system.
Records can also be retrieved from the IAM at any time
using the PC-based GTI Configurator software. Call detail
records contain the following information:
•
Record Type
•
Start Time
•
Elapsed Time
•
Call Type
•
Radio User ID
•
Line Number
•
Channel Number
•
Phone Number Dialed (up to 20 digits)
•
System Number
•
Node Number
INSTALLATION
OVERVIEW
The installation of the ELI option has been divided into
14 steps, which are described in this section. Not all steps
will apply to all installations. Some steps involve more than
one activity.
Table 1 shows a flow chart of the installation activities
for various pieces of equipment. The activities to the right
of a heavy vertical line should not be started until all those
activities to the left of the line have been completed for that
piece of equipment. The number in a circle to the left of
each activity indicates the installation step in the text where
the activity is described.
These 14 installation steps plus the configuration of the
Site Controller database (contained in the Configuration
section of this manual) and the configuration of the GTI
database (contained in the GTI Configurator software user’s
guide) are summarized in the Installation Checklist at the
end of this manual. Make a copy of this checklist, and
check off items as they are completed.