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ATS7100/7110 Installation and Troubleshooting Guide 5
PRI is intended for users with
greater capacity requirements.
In Europe, PRI consists of 30
B channels plus one 64 kb/s D
channel for a total of 1984
kb/s.
1. INTRODUCTION
1.1. General
This installation guide describes the installation of:
ATS7100 ISDN B-channel dialler; and
ATS7110 ISDN D-channel transmitter
ISDN Definitions
ISDN, (Integrated Services Digital Network)
It is a system of digital phone connections which allows
data to be transmitted simultaneously across the world
using end-to-end digital connectivity.
With ISDN, voice and data are carried by bearer
channels (B channels) occupying a bandwidth of 64
kb/s (bits per second). A data channel (D channel)
handles signalling at 16 kb/s or 64 kb/s, depending on
the service type. There are two basic types of ISDN
service: Basic Rate Interface (BRI) and Primary Rate
Interface (PRI).
Basic Rate Interface (BRI)
Primary Rate
Interface (PRI)
The ATS7100 and ATS7110 diallers are designed for
use on the BRI (ISDN-2).
Signalling
Instead of the phone company sending a ring voltage
signal to ring the bell in your phone ("In-Band signal"), it
sends a digital packet on a separate channel ("Out-of-
Band signal"). The Out-of-Band signal does not
interfere with established connections. No bandwidth is
taken from the data channels and call setup time is
quick. An ISDN call setup usually takes less than 2
seconds.
The signalling also indicates who the caller is, what
type of call it is (data/voice), and what number was
dialled. Available ISDN phone equipment is then
capable of making intelligent decisions on how to direct
the call.
Point to Multi Point Configuration (PTMP
ATS7100/ATS7110)
PTMP configurations are most common in a standard
BRI ISDN network (also called ISDN-2).
The maximum number of ISDN terminals that can be
connected to a BRI line is eight.
Point to Point Configuration (PTP only for
ATS7100)
PTP configurations are used when only one ISDN
terminal is connected to the ISDN network. In most
cases, the connected device will be a PABX.
Note: The ATS7100 must always be connected before
the PABX.
ISDN TEI values
It is possible to connect up to 8 devices to the ISDN S0
bus (PTMP). The NT1 keeps track of these devices by
using the Terminal Endpoint Identifier (TEI). This TEI is
an identification number that can have the following
values:
0-63 Fixed TEI (programmed by user)
64-126 Automatic TEI (assigned by the NT1)
127 Group TEI (message from NT1 to all devices)
When using the ATS71xx in a Point-to-MultiPoint
configuration for reporting using the analogue protocols
(like Sia, Contact ID), it will get a TEI value
automatically. This TEI value can be any value between
64 and 126.
In a Point-to-Point configuration there can only be one
device (application) on the bus, so there will be only
one TEI value. This TEI value for a Point-to-Point
configuration is 0 (fixed).
For X25 over D-channel reporting, fixed TEI values are
used. The used values are country dependent. In the
Netherlands, the TEI values are typically assigned as
follows:
1, 11, 21, … Digi-Access-Pin (Pay terminals)
2, 12, 22, … Digi-Access-Alarm
3, 13, 23, … Digi-Access-Standard
The first Digi-Access-Alarm device on the S0 bus will
get the TEI value 2 assigned (default), an optional
second Digi-Access-Alarm device TEI value 12, etc.
This TEI value needs to be programmed by the installer
in menu 19.9.
1.2. ATS7100
The ATS7100 uses the ISDN B-channel for
communication with the alarm processing system or for
up and download panel programming. The ATS7100 is
designed for Point to Multi Point configurations as well
as Point to Point configurations
1.3. ATS7110
The ATS7110 uses the ISDN D-channel for
communication with the alarm processing system.
The principle of D-channel communication in an
intrusion environment is related to a special service on
a BRI ISDN line, which will be provided by the local
Telephone Company. This service gives access to the
so-called X-25 network and is available in a number of
countries of Europe, for example:
Netherlands: Digi-Access Alarm (300 bps)
Digi-Access Standaard (9600 bps)
Belgium: D-Watch (300 bps)
D-Watch Pro (9600 bps)
BRI consists of two 64 kb/s B
channels and one 16 kb/s D
channel for a total of 144 kb/s.
This basic service is intended
to meet the needs of most
individual users.
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