AVT MAGIC ISDN Service Manual download pdf (Page 81)

PAGE 81

MAGIC TOUCH Software

7.7.3.7 MSN

FIG. 53 MSN CONFIGURATION

After pressing the OK button all settings are accepted.

The Cancel key deletes all settings.

When MSNs must be used enter them in the MSN-1 fields. For each S

con-

nection, two MSN can be entered.

If your system consists of several partial systems all relevant links Slave 1,

Slave 2 and Slave 3 are displayed. The MSN can be entered for these links.

7.7.3.7.1 Redundant system with MSN with block switching

The MSN-2 field is intended for use in a redundant system. For security rea-

sons, many radio stations have a second studio that is completely identical to

the first one. In case of fault, calls can be switched immediately to the second

studio. In general, the switching to another ISDN number is quite difficult,

but the Hybrid offers the possibility of choosing another MSN Block via a TTL

control signal.

To activate the redundant system, set the System redundancy option.

For this principal, two Hybrids are operated on the same ISDN Bus. There-

fore, without an MSN entry, both Hybrids would signal one caller. To always

make sure that only one Hybrid is active, both systems must have a valid

number in MSN-1. In MSN-2, enter an invalid number (e.g. 1111111) in both

MSN Usage

An MSN (Multiple Subscriber Number) is used for addressing a particular

unit on an ISDN Bus. This bus allows the operation of up to eight units in par-

allel.

If only one unit is connected, the entry of MSN is normally not necessary.

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AVT MAGIC ISDN Service Manual Page 81