Bedienungsanleitung Aritech ATS7100 (Seite 6 von 24) (Englisch, Holländisch)

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6 ATS7100/7110 Installation and Troubleshooting Guide

The Central Station to which the ATS7110 will be

connected must order this special service. With this

service the D-channel can have access to a Closed

User Group (CUG)

The X25 Enai protocol is able to use the X25 D-Bit. This

reduces the number of packets that is transmitted, and

thus transmission costs. The availability of this feature

depends on the network. Currently it is supported (X25

D-Bit set to Yes) in the Netherlands. In Belgium the

option X25 D-Bit shall be set to No.

On parallel the ATS7110 has the possibility of using

one ISDN B-channel for up and download panel

programming, or B-channel alarm reporting to the Titan

Management package.

One B-channel will always be available for other

applications such as phoning and faxing.

The alarm processing system receives alarms of the

ATS7110 via an X.25 receiver.

The ATS7110 sends test reports continuously. If the

X.25 receiver doesn’t receive the test reports anymore,

a communication fall-out is immediately passed on to

the processing system.

Encryption (ATS7110)

Messages to the alarm processing system are

encrypted. Even messages with the same contents will

differ each time during transportation.

1.4. EURO-ISDN Compliancy

The ATS7100/7110 ISDN complies with the CTR3 A1

(EURO-ISDN) standard for the following usages:

Automatic dialling

Multiple repeat attempts

The ATS7100/7110 ISDN is also capable of the

following:

Automatic call initialisation

Automatic answering

Any usage other than those approved, or failure to

comply with the installation and programming

instructions may invalidate any approval given to the

apparatus if, as a result, the apparatus ceases to

comply with the standards against which approval was

granted.

1.5. Connecting to ISDN

The ATS7100/7110 ISDN dialler is connected to the

ISDN network via an NT1 (Network Terminator 1). This

NT1 is part of the local Telephone Company equipment

and therefore always installed by that company. The

physical connection between the NT1 and the

ATS7100/7110 ISDN is by a standard RJ45-RJ45

cable, as described by the ISDN specifications.

PSTN

ISDN

NT1

T '

S0' S0

ATS7100





 On site

 Central station receiver

R Termination resistor

(2 x 100 Ohms)

T ISDN terminal (e.g.

ISDN phone)

TA Terminal adapter

(e.g. ISDN to PSTN)

T’ e.g. PSTN phone

NT1 ISDN termination

device

S0 Incoming ISDN from

NT1

S0’ To other ISDN

devices

Connecting to NT1

Usually an NT1 is equipped with two RJ45 outlets that

can be used simultaneously when connecting the ISDN

terminals. For security applications, however, the

second outlet should never be used. If the second RJ45

plug of the NT1 is used, the priority switch of the dialler

will not be able to guarantee a free B-channel for the

dialler as the priority switch only affects the terminals

connected to the S0 out connector of the dialler.

Connection built-up (ATS7100)

The ATS7100 can only make use of B-channel

transmission although the connections will be

established by the D-channel. A total of 4 central

stations can be programmed, each supporting a main

telephone number and a back-up number. Each central

station can be configured for different areas and alarm

protocols. Even voice reporting is supported (see also

the installation manual of the optional voice module

ATS7200).

For more details, see the ATS2000/3000/4000/4500

programming manual.

Connection built-up (ATS7110)

The ATS7110 can make use of D-channel transmission

as well as of B-channel transmission for alternative

reporting. For D-channel transmission, a polling

mechanism can be set to 90 seconds or 15 minutes.

When this polling mechanism fails, the central station

takes action to inform the customer.

In this case even a B-channel connection can be

established. Meanwhile, the polling mechanism repeats

until the connection has come about.

Priority switching

If the ATS7100/7110 ISDN dialler is used in a

configuration with other ISDN equipment on the same

S0 bus, a fax or telephone could occupy both B-

channels when the ATS7100/7110 ISDN needs to

transmit an alarm event. Standard ISDN methods will

not allow a B-channel to be freed for the ATS7100/7110

to use.

Consequently, the current state of the active sessions

on the local S0 bus are stored in an internal database.

The ATS7100/7110 ISDN “knows” if there are any B-

channels available and also keeps a record of the

current session parameters, such as TEI, call reference

value, and the send and receive sequence numbers.

When both B-channels are occupied, the

ATS7100/7110 ISDN sends a disconnect signal on

behalf of one of the connected ISDN devices. The ISDN

network will perform further necessary actions. The

disconnect signal will be sent for the other device if

there is still no connection after five seconds. If there is

no B-channel available after another delay of five

seconds, the dialler sends a disconnect signal for both

devices. When still no B-channel is available, a timeout

will occur. As soon as there is a B-channel available,

the dialler will transmit.

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